{"id":271,"date":"2014-09-27T07:41:18","date_gmt":"2014-09-26T23:41:18","guid":{"rendered":"http:\/\/www.datarelab.com\/blog\/?p=271"},"modified":"2015-01-18T19:03:29","modified_gmt":"2015-01-18T11:03:29","slug":"ssd%e5%9b%ba%e6%80%81%e7%a1%ac%e7%9b%98%e7%ae%80%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/www.datarelab.com\/blog\/Technical_literature\/271.html","title":{"rendered":"SSD(\u56fa\u6001\u786c\u76d8)\u7b80\u4ecb"},"content":{"rendered":"<p>&nbsp;<\/p>\n<hr \/>\n<h2>SSD \u7684\u7ec4\u6210\u7ed3\u6784<\/h2>\n<p>SSD \u7684\u5173\u952e\u90e8\u4ef6\u7531\u63a7\u5236\u5668\u548c\u5b58\u50a8\u5355\u5143\u4e24\u90e8\u5206\u7ec4\u6210\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709\u7f13\u5b58\u548c\u4e3b\u673a\u63a5\u53e3\u3002<\/p>\n<h3>\u63a7\u5236\u5668<\/h3>\n<p>\u6bcf\u4e2a SSD \u90fd\u6709\u4e00\u4e2a\u63a7\u5236\u5668(controller)\u5c06\u5b58\u50a8\u5355\u5143\u8fde\u63a5\u5230\u7535\u8111\u3002\u63a7\u5236\u5668\u662f\u4e00\u4e2a\u6267\u884c\u56fa\u4ef6(firmware)\u4ee3\u7801\u7684\u5d4c\u5165\u5f0f\u5904\u7406\u5668\u3002\u4e3b\u8981\u529f\u80fd\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u9519\u8bef\u68c0\u67e5\u548c\u7ea0\u6b63(ECC)<\/li>\n<li>\u78e8\u635f\u5e73\u8861(Wear leveling)<\/li>\n<li>\u574f\u5757\u6620\u5c04(Bad block mapping)<\/li>\n<li>read disturb(\u8bfb\u53d6\u67d0\u4e2a\u5757\u7684\u6570\u636e\u7684\u65f6\u5019\u4f1a\u5f71\u54cd\u5230\u76f8\u90bb\u5757\u7684\u6570\u636e)\u7ba1\u7406<\/li>\n<li>\u7f13\u5b58\u63a7\u5236<\/li>\n<li>\u5783\u573e\u56de\u6536<\/li>\n<li>\u52a0\u5bc6<\/li>\n<\/ul>\n<p>\u5f88\u663e\u7136\uff0c\u63a7\u5236\u5668\u662f SSD \u7684\u5927\u8111\uff0c\u800c\u56fa\u4ef6\u7684\u597d\u574f\u5219\u4ee3\u8868\u5176\u667a\u5546\u7684\u9ad8\u4f4e\u3002<\/p>\n<h3>\u5b58\u50a8\u5355\u5143<\/h3>\n<p>\u5c3d\u7ba1\u6709\u67d0\u4e9b\u5382\u5546\u63a8\u51fa\u4e86\u57fa\u4e8e\u66f4\u9ad8\u901f\u7684 DRAM \u5185\u5b58\u7684\u4ea7\u54c1\uff0c\u4f46 NAND \u95ea\u5b58\u4f9d\u7136\u6700\u5e38\u89c1\uff0c\u5360\u636e\u7740\u7edd\u5bf9\u4e3b\u5bfc\u5730\u4f4d\u3002\u4f4e\u7aef\u4ea7\u54c1\u4e00\u822c\u91c7\u7528 MLC(multi-level cell) \u751a\u81f3 TLC(Triple Level Cell) \u95ea\u5b58\uff0c\u5176\u7279\u70b9\u662f\u5bb9\u91cf\u5927\u3001\u901f\u5ea6\u6162\u3001\u53ef\u9760\u6027\u4f4e\u3001\u5b58\u53d6\u6b21\u6570\u4f4e\u3001\u4ef7\u683c\u4e5f\u4f4e\u3002\u9ad8\u7aef\u4ea7\u54c1\u4e00\u822c\u91c7\u7528 SLC(single-level cell) \u95ea\u5b58\uff0c\u5176\u7279\u70b9\u662f\u6280\u672f\u6210\u719f\u3001\u5bb9\u91cf\u5c0f\u3001\u901f\u5ea6\u5feb\u3001\u53ef\u9760\u6027\u9ad8\u3001\u5b58\u53d6\u6b21\u6570\u9ad8\u3001\u4ef7\u683c\u4e5f\u9ad8\u3002\u4f46\u662f\u4e8b\u5b9e\u4e0a\uff0c\u53d6\u51b3\u4e8e\u4e0d\u540c\u4ea7\u54c1\u7684\u5185\u90e8\u67b6\u6784\u8bbe\u8ba1\uff0c\u901f\u5ea6\u548c\u53ef\u9760\u6027\u7684\u5dee\u522b\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5404\u79cd\u6280\u672f\u52a0\u4ee5\u5f25\u8865\u751a\u81f3\u53cd\u8f6c\u3002<\/p>\n<h3>\u7f13\u5b58<\/h3>\n<p>\u57fa\u4e8e NAND \u95ea\u5b58\u7684 SSD \u901a\u5e38\u5e26\u6709\u4e00\u4e2a\u57fa\u4e8e DRAM \u7684\u7f13\u5b58\uff0c\u5176\u4f5c\u7528\u4e0e\u666e\u901a\u7684\u673a\u68b0\u5f0f\u786c\u76d8\u7c7b\u4f3c\uff0c\u4f46\u662f\u8fd8\u4f1a\u5b58\u50a8\u4e00\u4e9b\u8bf8\u5982 Wear leveling \u6570\u636e\u4e4b\u7c7b\u7684\u5176\u4ed6\u6570\u636e\u3002\u628a\u6570\u636e\u5148\u7f13\u5b58\u5728 DRAM \u4e2d\uff0c\u7136\u540e\u96c6\u4e2d\u5199\u5165\uff0c\u4ece\u800c\u51cf\u5c11\u5199\u5165\u6b21\u6570\u3002\u7279\u4f8b\u4e4b\u4e00\u662f SandForce \u751f\u4ea7\u7684\u63a7\u5236\u5668\uff0c\u5b83\u5e76\u4e0d\u542b\u6709\u7f13\u5b58\uff0c\u4f46\u662f\u6027\u80fd\u4f9d\u65e7\u5f88\u51fa\u8272\uff0c\u7531\u4e8e\u5176\u7ed3\u6784\u7b80\u5355\uff0c\u6545\u800c\u53ef\u4ee5\u751f\u4ea7\u4f53\u79ef\u66f4\u5c0f\u7684 SSD\uff0c\u5e76\u4e14\u6389\u7535\u65f6\u6570\u636e\u66f4\u5b89\u5168\u3002<\/p>\n<h3>\u4e3b\u673a\u63a5\u53e3<\/h3>\n<p>\u4e3b\u673a\u63a5\u53e3\u4e0e\u63a7\u5236\u5668\u7d27\u5bc6\u76f8\u5173\uff0c\u4f46\u662f\u901a\u5e38\u4e0e\u4f20\u7edf\u7684\u673a\u68b0\u5f0f\u786c\u76d8\u76f8\u5dee\u4e0d\u5927\uff0c\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n<ul>\n<li>SATA<\/li>\n<li>SAS<\/li>\n<li>PCI-E<\/li>\n<li>Fibre Channel<\/li>\n<li>USB<\/li>\n<\/ul>\n<p>\u4e3b\u673a\u63a5\u53e3\u7684\u901f\u5ea6\u9650\u5236\u4e86 SSD \u6240\u80fd\u8fbe\u5230\u7684\u901f\u5ea6\u5cf0\u503c\u3002\u4f46\u662f\u4e00\u822c\u8fd9\u5e76\u4e0d\u662f\u74f6\u9888\u6240\u5728\u3002<\/p>\n<h2>\u6027\u80fd\u4e0b\u964d\u4e0e\u5bff\u547d\u95ee\u9898<\/h2>\n<p>SSD \u7684\u6027\u80fd\u5927\u81f4\u4e0a\u53ef\u4ee5\u7528\u5e76\u884c\u5de5\u4f5c\u7684 NAND \u95ea\u5b58\u82af\u7247\u6570(\u4e5f\u79f0\u4e3a\u901a\u9053\u6570\uff0c\u76ee\u524d\u4e3b\u6d41\u7684\u56fa\u6001\u786c\u76d8\u62e5\u67098~16\u901a\u9053)\u6765\u8861\u91cf\u3002\u4e00\u4e2a\u5355\u72ec\u7684 NAND \u82af\u7247\u5f88\u6162\uff0c\u4f46\u662f\u5f53\u591a\u4e2a\u82af\u7247\u5e76\u884c\u5de5\u4f5c\u65f6\uff0c\u6027\u80fd\u5c31\u4f1a\u5f97\u5230\u5de8\u5927\u7684\u63d0\u5347\uff0c\u5176\u539f\u7406\u7c7b\u4f3c\u4e8e RAID0\uff0c\u4e70\u5757 SSD \u5c31\u7b49\u4e8e\u662f\u4e70\u4e86\u5757\"\u9635\u5217\u5361+\u76d8\"\u3002\u770b\u4e0a\u53bb\u5f88\u7f8e\u662f\u4e0d\u662f\uff1f<\/p>\n<p>\u57282010\u5e74\u7531\u8457\u540d\u7684 Xssist \u7f51\u7ad9\u4f7f\u7528 IOmeter \u5bf9 Intel X25-E 64 GB G1 \u8fdb\u884c\u7684\u4e00\u9879\u6d4b\u8bd5\u4e2d\uff0c\u4ee5 4KB \u968f\u673a 70%\u8bfb + 30%\u5199\u3001\u961f\u5217\u6df1\u5ea6\u4e3a4\uff0c\u8fdb\u884c\u6301\u7eed\u6d4b\u8bd5\u3002\u5f00\u59cb\u7684\u65f6\u5019\u53ef\u4ee5\u8fbe\u5230 10,000 IOPS \uff0c\u4f46\u662f\u6027\u80fd\u5f88\u5feb\u4fbf\u6025\u901f\u4e0b\u964d\uff0c8\u5206\u949f\u4e4b\u540e\u5c31\u53ea\u5269\u4e0b 4,000 IOPS \u4e86\uff0c\u800c50\u5206\u949f\u4e4b\u540e\uff0c\u5c31\u7a33\u5b9a\u5728 3,500 IOPS \u5de6\u53f3\u6447\u6446\u4e86\u3002<\/p>\n<p>\u9664\u4e86\u8fd9\u79cd\u77ed\u65f6\u95f4\u53ef\u53d1\u73b0\u7684\u6025\u901f\u6027\u80fd\u4e0b\u964d\u4e4b\u5916\uff0c\u8fd8\u5b58\u5728\u7740\u968f\u65f6\u95f4\u63a8\u79fb\uff0c\u6027\u80fd\u7f13\u6162\u4e0b\u964d\u7684\u95ee\u9898(\u4e3b\u8981\u662f\u5b58\u50a8\u5355\u5143\u8001\u5316\u548c\u635f\u574f\u6240\u81f4)\u3002<\/p>\n<p>\u80fd\u5426\u6709\u6548\u7684\u5904\u7406\u6027\u80fd\u4e0b\u964d\u95ee\u9898\u4e0d\u4f46\u5173\u7cfb\u5230 SSD \u7684\u957f\u671f\u8fd0\u884c\u7684\u5b9e\u9645\u6027\u80fd\uff0c\u800c\u4e14\u5173\u7cfb\u5230\u5176\u5bff\u547d(SSD \u4e00\u65e6\u635f\u574f\uff0c\u5176\u5185\u90e8\u7684\u6570\u636e\u5c06\u5168\u90e8\u4e22\u5931\uff0c\u800c\u4e14\u57fa\u672c\u4e0a\u662f\u4e0d\u53ef\u6062\u590d\u7684)\u3002\u56e0\u4e3a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u7684\u539f\u56e0\u4e5f\u548c\u5176\u4f7f\u7528\u5bff\u547d\u7d27\u5bc6\u76f8\u5173\u3002\u901a\u5e38\uff0c\u56fa\u6001\u786c\u76d8\u7684\u6027\u80fd\u8d8a\u5dee\u610f\u5473\u7740\u5b83\u7684\u4f7f\u7528\u5bff\u547d\u5c31\u8d8a\u77ed\u3002\u8fd9\u662f\u56e0\u4e3a\u56fa\u6001\u786c\u76d8\u7684\u78e8\u635f\u4e0e\u56fa\u6001\u786c\u76d8\u4e0a\u53d1\u751f\u7684\u6570\u636e\u5199\u5165\u548c\u6e05\u9664\u6b21\u6570\u76f4\u63a5\u76f8\u5173\u3002\u53d1\u751f\u5199\u6570\u636e\u7684\u6b21\u6570\u8d8a\u591a\uff0c\u6027\u80fd\u5c31\u8d8a\u5dee\uff0c\u5176\u5bff\u547d\u4e5f\u5c31\u8d8a\u77ed\u3002<\/p>\n<p>\u5bf9\u4f20\u7edf\u786c\u76d8\uff0c\u4eba\u4eec\u5e38\u7528\u5e73\u5747\u65e0\u6545\u969c\u65f6\u95f4(MBTF)\u6765\u6807\u8bc6\u5176\u53ef\u9760\u6027\uff0c\u73b0\u5728\u5f88\u591a SSD \u5236\u9020\u5546\u501f\u7528\u8fd9\u4e2a\u6307\u6807\u6765\u8bf4\u660e SSD \u8d28\u91cf\u7684\u9ad8\u4f4e\u3002\u663e\u7136\uff0c\u8fd9\u6837\u505a\u975e\u5e38\u626f\u6de1\u3002\u4e8b\u5b9e\u4e0a\uff0cSSD \u7684\u5bff\u547d\u4e0e\u5176\u5982\u4f55\u4f7f\u7528\u6709\u5bc6\u5207\u5173\u7cfb\u3002\u6bd4\u5982\uff0cIntel \u7684\u6d88\u8d39\u7ea7 SSD X25-M \u7684 MTBF \u4e3a120\u4e07\u4e2a\u5c0f\u65f6\uff0c\u4e0e\u666e\u901a\u7684\u78c1\u4ecb\u8d28\u5927\u4f53\u76f8\u5f53\u3002INTEL \u4f30\u8ba1\uff0c\u5982\u679c\u6bcf\u5929\u5199\u5165 100GB \u6570\u636e\u7684\u8bdd\uff0c\u7406\u8bba\u4e0a\u53ef\u4ee5\u4f7f\u75285\u5e74\uff0c\u4e0d\u8fc7\u8fd9\u4e2a\u53ea\u662f\u7406\u8bba\u4e0a\u7684\u6700\u4f18\u60c5\u51b5\uff0c\u5b9e\u9645\u5bff\u547d\u80af\u5b9a\u6bd4\u8fd9\u4e2a\u8981\u77ed\u3002\u53e6\u4e00\u65b9\u9762\uff0cNAND \u95ea\u5b58\u4e2d\u7684\u6570\u636e\u6700\u591a\u53ea\u53ef\u4ee5\u4fdd\u5b5810\u5e74\u5de6\u53f3\uff0c\u4e5f\u5c31\u662f\u8bf410\u5e74\u662f SSD \u7684\u7406\u8bba\u6700\u5927\u5bff\u547d\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cSSD \u7684\u4f7f\u7528\u5bff\u547d\u4e3b\u8981\u53d6\u51b3\u4e8e\u5176\u5199\u5165\u6570\u636e\u7684\u6b21\u6570\uff0c\u800c\u4e0e\u8bfb\u53d6\u6b21\u6570\u5173\u7cfb\u4e0d\u5927\u3002\u6709\u9274\u4e8e\u6b64\uff0c\u90a3\u4e9b\u4ee5\u201c\u4e00\u6b21\u5b58\u53d6\uff0c\u591a\u6b21\u67e5\u8be2\u201d\u4e3a\u4e3b\u7684\u5e94\u7528\u5f62\u5f0f(\u5982\u641c\u7d22\u5f15\u64ce\u3001\u6570\u636e\u4ed3\u5e93)\u5e94\u8be5\u662f SSD \u6700\u9002\u5408\u7684\u5e94\u7528\u573a\u5408\u3002<\/p>\n<p>\u4e3a\u4e86\u5f04\u6e05\u695a\u8fd9\u4e9b\u95ee\u9898\uff0c\u6211\u4eec\u5fc5\u987b\u8981\u8fdb\u4e00\u6b65\u4e86\u89e3 SSD \u76f8\u5173\u7684\u6280\u672f\u4fe1\u606f\u3002<\/p>\n<h2>SSD \u6280\u672f\u89e3\u6790<\/h2>\n<h3>SLC\/eSLC \u4e0e MLC\/eMLC \u4e0e TLC\/eTLC<\/h3>\n<p>SSD \u7684\u57fa\u672c\u5b58\u50a8\u5355\u5143\u5206\u4e3a\u4e09\u7c7b\uff1aSLC(Single Level Cell \u5355\u5c42\u5355\u5143) \u548c MLC(Multi-Level Cell \u591a\u5c42\u5355\u5143) \u4ee5\u53ca\u8f83\u65b0\u7684 TLC(Triple Level Cell \u4e09\u5c42\u5355\u5143) \u3002\u4f4e\u7aef\u4ea7\u54c1\u4e00\u822c\u91c7\u7528 MLC(multi-level cell) \u6216\u8005 TLC(Triple Level Cell) \u95ea\u5b58\uff0c\u5176\u7279\u70b9\u662f\u529f\u8017\u9ad8\u3001\u5bb9\u91cf\u5927\u3001\u901f\u5ea6\u6162(2MB\/S)\u3001\u53ef\u9760\u6027\u4f4e\u3001\u5b58\u53d6\u6b21\u6570\u4f4e(3000\u6b21[25nm]-1\u4e07\u6b21[50nm]\uff0c\u5236\u7a0b\u8d8a\u5148\u8fdb\u6b21\u6570\u53cd\u800c\u8d8a\u5c0f)\u3001\u4ef7\u683c\u4e5f\u4f4e\u3002\u9ad8\u7aef\u4ea7\u54c1\u4e00\u822c\u91c7\u7528 SLC(single-level cell) \u95ea\u5b58\uff0c\u5176\u7279\u70b9\u662f\u6280\u672f\u6210\u719f\u3001\u529f\u8017\u4f4e\u3001\u5bb9\u91cf\u5c0f\u3001\u901f\u5ea6\u5feb(8MB\/S)\u3001\u53ef\u9760\u6027\u9ad8\u3001\u5b58\u53d6\u6b21\u6570\u9ad8(10\u4e07\u6b21)\u3001\u4ef7\u683c\u4e5f\u9ad8\u3002\u9020\u6210\u8fd9\u79cd\u5dee\u5f02\u7684\u539f\u56e0\u5728\u4e8e\uff0c\u6bcf\u4e2a MLC\/TLC \u5b58\u50a8\u5355\u5143\u4e2d\u5b58\u653e\u7684\u8d44\u6599\u8f83\u591a\uff0c\u7ed3\u6784\u76f8\u5bf9\u590d\u6742\uff0c\u51fa\u9519\u7684\u51e0\u7387\u4f1a\u589e\u52a0\uff0c\u5fc5\u987b\u8fdb\u884c\u9519\u8bef\u4fee\u6b63\uff0c\u8fd9\u4e2a\u52a8\u4f5c\u5bfc\u81f4\u5176\u6027\u80fd\u548c\u53ef\u9760\u6027\u5927\u5e45\u843d\u540e\u4e8e\u7ed3\u6784\u7b80\u5355\u7684 SLC \u95ea\u5b58\u3002<\/p>\n<p>SLC \u5c31\u662f\u5728\u6bcf\u4e2a\u5b58\u50a8\u5355\u5143\u91cc\u5b58\u50a8 1bit \u7684\u6570\u636e\uff0c\u5b58\u50a8\u7684\u6570\u636e\u662f0\u8fd8\u662f1\u662f\u57fa\u4e8e\u7535\u538b\u9600\u503c\u7684\u5224\u5b9a\uff0c\u5bf9\u4e8e NAND Flash \u7684\u5199\u5165(\u7f16\u7a0b)\uff0c\u5c31\u662f\u63a7\u5236 Control Gate \u53bb\u5145\u7535(\u5bf9 Control Gate \u52a0\u538b)\uff0c\u4f7f\u5f97\u6d6e\u7f6e\u6805\u6781\u5b58\u50a8\u7684\u7535\u8377\u591f\u591a\uff0c\u8d85\u8fc74V\uff0c\u5b58\u50a8\u5355\u5143\u5c31\u8868\u793a 0(\u5df2\u7f16\u7a0b)\uff0c\u5982\u679c\u6ca1\u6709\u5145\u7535\u6216\u8005\u7535\u538b\u9600\u503c\u4f4e\u4e8e4V\uff0c\u5c31\u8868\u793a 1(\u5df2\u64e6\u9664)\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/slc.jpg\" alt=\"\" \/><\/p>\n<p>MLC \u5c31\u662f\u6bcf\u4e2a\u5b58\u50a8\u5355\u5143\u91cc\u5b58\u50a8 2bit \u7684\u6570\u636e\uff0c\u5b58\u50a8\u7684\u6570\u636e\u662f\"00\",\"01\",\"10\",\"11\"\u4e5f\u662f\u57fa\u4e8e\u7535\u538b\u9600\u503c\u7684\u5224\u5b9a\uff0c\u5f53\u5145\u5165\u7684\u7535\u8377\u4e0d\u8db33.5V\u65f6\uff0c\u5c31\u4ee3\u8868\"11\"\uff0c\u5f53\u5145\u5165\u7684\u7535\u8377\u57283.5V\u548c4.0V\u4e4b\u95f4\uff0c\u5219\u4ee3\u8868\"10\"\uff0c\u5f53\u5145\u5165\u7684\u7535\u8377\u57284V\u548c5.5V\u4e4b\u95f4\uff0c\u5219\u8868\u793a\"01\"\uff0c\u5f53\u5145\u5165\u7684\u7535\u8377\u57285.5V\u4ee5\u4e0a\uff0c\u5219\u8868\u793a\"00\"\u3002\u540c\u65f6\u7531\u524d\u9762\u7684\u56fe\u53ef\u4ee5\u770b\u5230\uff0cMLC \u76f8\u6bd4 SLC \u867d\u7136\u4f7f\u7528\u76f8\u540c\u7684\u7535\u538b\u503c\uff0c\u4f46\u662f\u7535\u538b\u4e4b\u95f4\u7684\u9600\u503c\u88ab\u5206\u6210\u4e864\u4efd\uff0c\u53ef\u4ee5\u60f3\u8c61\u8fd9\u6837\u5c31\u76f4\u63a5\u5f71\u54cd\u4e86\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/mlc.jpg\" alt=\"\" \/><\/p>\n<p>\u800c TLC \u5c31\u66f4\u52a0\u590d\u6742\uff0c\u56e0\u4e3a\u6bcf\u4e2a\u5b58\u50a8\u5355\u5143\u91cc\u5b58\u50a8 3bit \u7684\u6570\u636e\uff0c\u6240\u4ee5\u5b83\u7684\u7535\u538b\u9608\u503c\u7684\u5206\u754c\u70b9\u5c31\u66f4\u7ec6\u81f4\uff0c\u5bfc\u81f4\u7684\u7ed3\u679c\u4e5f\u5c31\u6bcf\u4e2a\u5b58\u50a8\u5355\u5143\u7684\u53ef\u9760\u6027\u4e5f\u66f4\u4f4e\u3002\u7531\u4e8e TLC \u4e0e MLC \u6ca1\u6709\u672c\u8d28\u533a\u522b\uff0c\u6240\u4ee5\u5728\u672c\u6587\u5269\u4f59\u90e8\u5206\u5c31\u4e0d\u518d\u63d0\u53ca TLC \u4e86\u3002<\/p>\n<p>\u5728 NAND Flash \u5de5\u5382\u5236\u9020\u5904\u7406\u8fc7\u7a0b\u4e2d\uff0c\u5382\u5546\u628a\u6676\u5143\u4e0a\u6700\u597d\u7684\u90a3\u90e8\u5206 Flash \u6676\u7247\u6311\u9009\u51fa\u6765\u5e76\u7528\u4f01\u4e1a\u7ea7\u7684\u6807\u51c6\u6765\u68c0\u6d4b\u6676\u7247\u7684\u6570\u636e\u5b8c\u6574\u6027\u548c\u8010\u4e45\u5ea6\u3002\u68c0\u6d4b\u5b8c\u540e\uff0c\u8fd9\u4e9b\u6676\u7247\u88ab\u53d6\u4e0b\u6765\u6539\u53d8\u5185\u90e8\u4e9b\u8bb8\u53c2\u6570\u5e76\u8fdb\u884c\u4e4b\u540e\u7684\u6bd4\u6807\u51c6 SLC\/MLC \u66f4\u82db\u523b\u7684\u6d4b\u8bd5\u3002\u5f53\u8fd9\u4e9b\u6676\u7247\u901a\u8fc7\u6d4b\u8bd5\u540e\uff0c\u5c31\u88ab\u5b9a\u4e49\u4e3a eSLC\/eMLC \u7ea7\u522b\u7ec4\uff0c\u4f59\u4e0b\u7684\u5c31\u6210\u4e3a\u666e\u901a SLC\/MLC \u7ea7\u522b\u7ec4\u4e86\u3002<\/p>\n<p>\u76f8\u5bf9\u666e\u901a SLC\/MLC \u6765\u8bf4\uff0ceSLC\/eMLC \u7684\u4e0d\u540c\u4e4b\u5904\u4e3b\u8981\u4f53\u73b0\u5728\u4e0b\u97624\u4e2a\u65b9\u9762\uff1a<\/p>\n<ul>\n<li>P\/E \u6570\u5b57\u66f4\u5927\uff0c\u6bd4\u598234nm\u9541\u5149\u7684 eMLC \u662f30,000\u6b21\uff0c\u800c MLC \u662f5000\u6b21\u3002<\/li>\n<li>eSLC\/eMLC \u64e6\u5199\u64cd\u4f5c\u548c\u7f16\u7a0b\u64cd\u4f5c\u6240\u9700\u8981\u7684\u65f6\u95f4\u76f8\u6bd4 SLC\/MLC \u66f4\u957f\u3002<\/li>\n<li>\u5f53\u4f7f\u7528\u5b8c\u5382\u5546\u4fdd\u8bc1\u7684P\/E\u6570\u540e\uff0ceSLC\/eMLC \u7684\u6570\u636e\u4fdd\u5b58\u671f\u4e00\u822c\u57283\u4e2a\u6708\uff0c\u800c SLC\/MLC \u7684\u6570\u636e\u4fdd\u5b58\u671f\u57281\u5e74\u3002<\/li>\n<li>\u76f8\u5bf9\u5728\u7684\u4f01\u4e1a\u7ea7\u5e94\u7528\u4e0b\uff0c\u4f7f\u7528 eSLC\/eMLC \u7684\u7a33\u5b9a\u6027\u6bd4 SLC\/MLC \u8981\u9ad8\u5f97\u591a\uff0c\u4e5f\u5c31\u662f\u51fa\u9519\u7684\u6982\u7387\u66f4\u5c0f\u3002<\/li>\n<\/ul>\n<h3>Legacy\/ONFI\/Toggly<\/h3>\n<p>\u65e9\u671f\u7684\u95ea\u5b58\u4ea7\u54c1\u6bcf\u4e2a\u5382\u5bb6\u7684\u8bbe\u8ba1\u6807\u51c6\u5404\u6709\u4e0d\u540c\uff0c\u4f1a\u78b0\u5230\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u7279\u522b\u662f\u5230\u4e862006\u5e74\u4e4b\u540e\uff0c\u95ea\u5b58\u4ea7\u4e1a\u5e02\u573a\u9700\u6c42\u5f00\u59cb\u53d1\u529b\uff0c\u9020\u6210\u4e86\u8feb\u5207\u9700\u8981\u4e00\u4e2a\u7edf\u4e00\u7684\u6807\u51c6\u6765\u6539\u53d8\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p>\u7531\u4e8e\u4f20\u7edf\u7684 Legacy \u63a5\u53e3\u6bcf\u901a\u9053\u4f20\u8f93\u5e26\u5bbd\u4e3a 40MT\/s\uff0c\u5df2\u7ecf\u4e0d\u80fd\u6ee1\u8db3\u73b0\u4eca\u9ad8\u901f\u53d1\u5c55\u7684 SSD \u4ea7\u54c1\u9700\u6c42\u30022007\u5e741\u6708\uff0c\u4ee5\u82f1\u7279\u5c14\uff0c\u9541\u5149\uff0c\u6d77\u529b\u58eb\uff0c\u610f\u6cd5\u534a\u5bfc\u4f53\uff0c\u529b\u6676\u4e3a\u9996\u7684 NAND \u95ea\u5b58\u5382\u5546\u548c\u63a7\u5236\u82af\u7247\u5f00\u53d1\u5546\u53f0\u6e7e\u7fa4\u8054\u7535\u5b50\u4ee5\u53ca\u4ea7\u54c1\u5382\u5546\u7d22\u5c3c\u7b49\u5ba3\u5e03\u7edf\u4e00\u5236\u5b9a\u8fde\u63a5 NAND \u95ea\u5b58\u548c\u63a7\u5236\u82af\u7247\u7684\u63a5\u53e3\u6807\u51c6\"ONFI 1.0\"\u3002ONFI 1.0 \u6807\u51c6\u628a\u4f20\u7edf Legacy \u63a5\u53e3\u6bcf\u901a\u9053\u4f20\u8f93\u5e26\u5bbd\u63d0\u5347\u5230\u4e86 50MT\/s\uff0c\u53ef\u4ee5\u8bf4 ONFI 1.0 \u7684\u76ee\u7684\u4e3b\u8981\u662f\u60f3\u7740\u7edf\u4e00\u63a5\u53e3\u7684\u8bbe\u8ba1\u3002<\/p>\n<p>2008\u5e742\u6708\uff0cONFI 2.0 \u5ba3\u5e03\u4e86\uff0cONFI 2.0 \u7684\u6807\u51c6\u4f7f NAND \u95ea\u5b58\u7684\u901a\u9053\u4f20\u8f93\u5e26\u5bbd\u4ece 50MT\/s \u63d0\u9ad8\u5230\u4e86 133MT\/s \uff0c\u5e76\u4fdd\u6301\u4e86\u8001\u7248\u672c\u63a5\u53e3\u7684\u517c\u5bb9\u6027\u3002<\/p>\n<p>2009\u5e742\u6708\uff0cONFI 2.1 \u5ba3\u5e03\u4e86\uff0c\u76f8\u6bd4 ONFI 2.0 \u66f4\u52a0\u7b80\u5316\u4e86\u95ea\u5b58\u63a7\u5236\u5668\u8bbe\u8ba1\uff0c\u5e76\u5c06\u4f20\u8f93\u6027\u80fd\u63d0\u5347\u5230 166MT\/s ~ 200MT\/s \u9644\u8fd1\u3002<\/p>\n<p>2009\u5e7410\u6708\uff0cONFI 2.2 \u5ba3\u5e03\u4e86\uff0c\u5728 ONFI 2.1 \u7684\u57fa\u7840\u4e0a\uff0cONFI 2.2 \u52a0\u5165\u4e86\u72ec\u7acb LUN \u91cd\u7f6e\uff0c\u589e\u5f3a\u9875\u7f16\u7a0b\u5bc4\u5b58\u5668\u7684\u6e05\u9664\uff0c\u65b0\u7684 ICC \u6d4b\u91cf\u548c\u89c4\u8303\u3002<\/p>\n<p>2011\u5e743\u6708\uff0cONFI 3.0 \u5ba3\u5e03\u4e86\uff0c\u63d0\u5347\u63a5\u53e3\u5e26\u5bbd\u5230 400MT\/s\uff0c\u964d\u4f4eCE\u9488\u811a\u9700\u6c42\u6765\u63d0\u5347PCB\u7684\u5e03\u5c40\u80fd\u529b\uff0c\u652f\u6301 EZ-NAND(\u95ea\u5b58\u5185\u96c6\u6210ECC)\u63a5\u53e3\u3002<\/p>\n<p>2013\u5e747\u6708\uff0cONFI 3.2 \u5ba3\u5e03\u4e86\uff0c\u63d0\u5347\u63a5\u53e3\u5e26\u5bbd\u5230 533MT\/s\u3002<\/p>\n<p>\u53e6\u4e00\u65b9\u9762\uff0c\u8001\u724c NAND \u5236\u9020\u5382\u5546\u4e09\u661f\u7684\u63a5\u53e3\u6807\u51c6\u4e3a OneNAND\uff0c\u800c\u4e1c\u829d\u7684\u63a5\u53e3\u6807\u51c6\u4e3a LBA-NAND\uff0c\u7531\u4e8e\u8fd9\u4e24\u5bb6\u5168\u7403\u4efd\u989d\u52a0\u8d77\u6765\u63a5\u8fd170%\uff0c\u4e0d\u53ef\u80fd\u8ba9IM(\u82f1\u7279\u5c14\/\u9541\u5149\u65b0\u52a0\u5761\u5408\u8d44NAND\u5382)\u8fd9\u4e2a\u540e\u8d77\u4e4b\u79c0\u90a3\u4e48\u56a3\u5f20\uff0c\u6240\u4ee5\u57282007\u5e74\u5e95\uff0c2\u5bb6\u8001\u724c NAND \u5236\u9020\u5382\u5546\u8fdb\u884c\u4e86\u6280\u672f\u4e0a\u4ea4\u4e92\u5f0f\u6388\u6743\uff0c\u5c06\u5171\u4eab\u4e09\u661f\u7684 OneNAND \u548c\u4e1c\u829d\u7684 LBA-NAND \u95ea\u5b58\u4e13\u5229\u6280\u672f\u548c\u54c1\u724c\u7684\u751f\u4ea7\u3001\u5e02\u573a\u548c\u9500\u552e\u6743\u3002<\/p>\n<p>2010\u5e746\u6708\uff0c\u4e09\u661f\u548c\u4e1c\u829d\u5ba3\u5e03\u4e86\u4ed6\u4eec\u7684\u65b0\u7684 NAND \u6570\u636e\u901a\u9053\u63a5\u53e3\u6807\u51c6\u3002DDR Toggle Mode \u6a21\u5f0f\uff0c\u76f8\u6bd4\u4f20\u7edf\u7684\u5f02\u6b65 NAND \u95ea\u5b58\uff0c\u5176\u63a5\u53e3\u5e26\u5bbd\u53ef\u4ece 40MT\/s \u63d0\u5347\u5230 133MT\/s\uff0cDDR Toggle Mode NAND \u95ea\u5b58\u4f7f\u7528\u53cc\u5411DQS\u751f\u6210\u8f93\u5165\/\u8f93\u51fa\u4fe1\u53f7\uff0c\u5728\u4fe1\u53f7\u4e0a\u5347\u6cbf\u548c\u4e0b\u964d\u6cbf\u90fd\u80fd\u8fdb\u884c\u8d44\u6599\u7684\u4f20\u8f93\uff0c\u6240\u4ee5\u901f\u5ea6\u53ef\u4ee5\u7ffb\u500d\u3002\u7531\u4e8e\u8fd8\u662f\u5f02\u6b65\u8bbe\u8ba1\uff0c\u6ca1\u6709\u6539\u53d8\u7279\u5b9a\u7684\u65f6\u949f\u4fe1\u53f7\uff0c\u76f8\u5bf9\u540c\u6b65\u8bbe\u8ba1\u4e0a\u4f1a\u66f4\u7701\u7535\uff0c\u8bbe\u8ba1\u4e0a\u4f1a\u4e5f\u76f8\u5bf9\u7b80\u5355\u3002<\/p>\n<p>2011\u5e74\uff0cDDR Toggle Mode 2.0 \u7248\u5ba3\u5e03\uff0c\u63a5\u53e3\u5e26\u5bbd\u589e\u52a0\u5230\u4e86 400MT\/s\u30022011\u5e74\uff0c\u4e09\u661f\u518d\u6b21\u4e8e\u5168\u7403\u7387\u5148\u91cf\u4ea7 400Mbps \u4f20\u8f93\u901f\u5ea6\u7684 64Gb Toggle DDR 2.0 MLC NAND Flash \u65b0\u54c1\uff0c\u751f\u4ea7\u5382\u5546\u5c06\u4ece2011\u5e74\u4e0b\u534a\u5e74\u5f00\u59cb\u63a8\u51fa\u5404\u79cd\u57fa\u4e8e 64Gb \u9ad8\u901f NAND Flash \u7684\u9ad8\u6027\u80fd\u3001\u5927\u5bb9\u91cf\u4ea7\u54c1\u3002<\/p>\n<p>\u9884\u8ba12015-2017\u5e74\uff0c\u6211\u4eec\u5c06\u8fce\u6765 Toggle DDR Mode 3.0 \u6807\u51c6\uff0c\u5c4a\u65f6\u5e26\u5bbd\u5c06\u8fbe\u5230800MT\/s\u3002<\/p>\n<p>\u603b\u4e4b\uff0c\u76ee\u524d NAND \u6570\u636e\u901a\u9053\u63a5\u53e3\u6807\u51c6\u6709\u4e24\u5927\u9635\u8425\uff1aIntel\/Micron \u7684\u6807\u51c6\u662f ONFI\uff0c\u4e09\u661f\u548c\u4e1c\u829d\u7684\u6807\u51c6\u53eb Toggly \u3002<\/p>\n<h3>\u591a Plane NAND<\/h3>\n<p>\u591a Plane NAND \u662f\u4e00\u79cd\u80fd\u591f\u6709\u6548\u63d0\u5347\u6027\u80fd\u7684\u8bbe\u8ba1\u3002\u591a Plane \u7684\u539f\u7406\u5f88\u7b80\u5355\uff0c\u4ece\u4e0b\u56fe\u4e2d(Micron 25nm L73A)\u6211\u4eec\u770b\u5230\uff0c\u4e00\u4e2a\u6676\u7247\u5185\u90e8\u5206\u6210\u4e862\u4e2a Plane\uff0c\u800c\u4e142\u4e2a Plane \u5185\u7684 Block \u7f16\u53f7\u662f\u5355\u53cc\u4ea4\u53c9\u7684\uff0c\u60f3\u8c61\u6211\u4eec\u5728\u64cd\u4f5c\u65f6\uff0c\u4e5f\u53ef\u4ee5\u8fdb\u884c\u4ea4\u53c9\u64cd\u4f5c(\u4e00\u5355\u4e00\u53cc)\u6765\u63d0\u5347\u6027\u80fd\uff0c\u6839\u636e\u6d4b\u8bd5\uff0c\u67d0\u4e9b\u60c5\u51b5\u4e0b\u6027\u80fd\u53ef\u4ee5\u6bd4\u5355 Plane \u8bbe\u8ba1\u63d0\u9ad8\u7ea650%\u4ee5\u4e0a\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/plane_1.jpg\" alt=\"\" \/><\/p>\n<p>\u4e0b\u56fe\u4e2d\u6211\u4eec\u770b\u52302\u4e2a Plane Page \u8bfb\u53d6\u64cd\u4f5c\u76f8\u6bd4\u5355\u4e2a Page \u8bfb\u53d6\u64cd\u4f5c\u6bcf2\u4e2a Page \u8282\u7701\u4e86\u4e00\u6b21 Page \u8bfb\u53d6\u65f6\u95f4\u3002\u540c\u6837\u4f5c\u4e3a\u64e6\u9664\uff0c\u5199\u5165\u64cd\u4f5c\u7684\u8bdd\uff0c2\u4e2a Plane \u7684\u4ea4\u53c9\u64cd\u4f5c\u4e5f\u80fd\u5e26\u6765\u6027\u80fd\u7684\u63d0\u5347\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/plane_2.jpg\" alt=\"\" \/><\/p>\n<h3>FLT<\/h3>\n<p>\u64cd\u4f5c\u7cfb\u7edf\u901a\u5e38\u5c06\u786c\u76d8\u7406\u89e3\u4e3a\u4e00\u8fde\u4e32 512B \u5927\u5c0f\u7684<strong>\u6247\u533a<\/strong>[\u6ce8\u610f\uff1a\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u78c1\u76d8\u8fdb\u884c\u4e00\u6b21\u8bfb\u6216\u5199\u7684\u6700\u5c0f\u5355\u4f4d\u5e76\u4e0d\u662f\u6247\u533a\uff0c\u800c\u662f\u6587\u4ef6\u7cfb\u7edf\u7684<strong>\u5757<\/strong>\uff0c\u4e00\u822c\u4e3a 512B\/1KB\/4KB \u4e4b\u4e00(\u4e5f\u53ef\u80fd\u66f4\u5927)\uff0c\u5176\u5177\u4f53\u5927\u5c0f\u5728\u683c\u5f0f\u5316\u65f6\u8bbe\u5b9a]\uff0c\u4f46\u662f\u95ea\u5b58\u7684\u8bfb\u5199\u5355\u4f4d\u662f 4KB \u6216 8KB \u5927\u5c0f\u7684<strong>\u9875<\/strong>\uff0c\u800c\u4e14\u95ea\u5b58\u7684\u64e6\u9664(\u53c8\u53eb\u7f16\u7a0b)\u64cd\u4f5c\u662f\u6309\u7167 128 \u6216 256 \u9875\u5927\u5c0f\u7684<strong>\u5757<\/strong>\u6765\u64cd\u4f5c\u7684\u3002\u66f4\u8981\u547d\u7684\u662f\u5199\u5165\u6570\u636e\u524d\u5fc5\u987b\u8981\u5148\u64e6\u9664\u6574\u4e2a\u5757\uff0c\u800c\u4e0d\u80fd\u76f4\u63a5\u8986\u76d6\u3002\u8fd9\u5b8c\u5168\u4e0d\u7b26\u5408\u73b0\u6709\u7684\u3001\u9488\u5bf9\u4f20\u7edf\u786c\u76d8\u8bbe\u8ba1\u7684\u6587\u4ef6\u7cfb\u7edf\u7684\u64cd\u4f5c\u65b9\u5f0f\uff0c\u5f88\u660e\u663e\uff0c\u6211\u4eec\u9700\u8981\u66f4\u9ad8\u7ea7\u3001\u4e13\u95e8\u9488\u5bf9 SSD \u8bbe\u8ba1\u7684\u6587\u4ef6\u7cfb\u7edf\u6765\u9002\u5e94\u8fd9\u79cd\u64cd\u4f5c\u65b9\u5f0f\u3002\u4f46\u9057\u61be\u7684\u662f\uff0c\u76ee\u524d\u8fd8\u6ca1\u6709\u8fd9\u6837\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n<p>\u4e3a\u4e86\u517c\u5bb9\u73b0\u6709\u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u5c31\u51fa\u73b0\u4e86 FTL(\u95ea\u5b58\u8f6c\u6362\u5c42)\uff0c\u5b83\u4f4d\u4e8e\u6587\u4ef6\u7cfb\u7edf\u548c\u7269\u7406\u4ecb\u8d28\u4e4b\u95f4\uff0c\u628a\u95ea\u5b58\u7684\u64cd\u4f5c\u4e60\u60ef\u865a\u62df\u6210\u4ee5\u4f20\u7edf\u786c\u76d8\u7684 512B \u6247\u533a\u8fdb\u884c\u64cd\u4f5c\u3002\u8fd9\u6837\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5c31\u53ef\u4ee5\u6309\u7167\u4f20\u7edf\u7684\u6247\u533a\u65b9\u5f0f\u64cd\u4f5c\uff0c\u800c\u4e0d\u7528\u62c5\u5fc3\u4e4b\u524d\u8bf4\u7684\u64e6\u9664\/\u8bfb\/\u5199\u95ee\u9898\u3002\u4e00\u5207\u903b\u8f91\u5230\u7269\u7406\u7684\u8f6c\u6362\uff0c\u5168\u90e8\u7531 FTL \u5c42\u5305\u4e86\u3002<\/p>\n<p>FTL \u7b97\u6cd5\uff0c\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u79cd\u903b\u8f91\u5230\u7269\u7406\u7684\u6620\u5c04\uff0c\u56e0\u6b64\uff0c\u5f53\u6587\u4ef6\u7cfb\u7edf\u53d1\u9001\u6307\u4ee4\u8bf4\u8981\u5199\u5165\u6216\u8005\u66f4\u65b0\u4e00\u4e2a\u7279\u5b9a\u7684\u903b\u8f91\u6247\u533a\u65f6\uff0cFTL \u5b9e\u9645\u4e0a\u5199\u5165\u4e86\u53e6\u4e00\u4e2a\u7a7a\u95f2\u7269\u7406\u9875\uff0c\u5e76\u66f4\u65b0\u6620\u5c04\u8868\uff0c\u518d\u628a\u8fd9\u4e2a\u9875\u4e0a\u5305\u542b\u7684\u65e7\u6570\u636e\u6807\u8bb0\u4e3a\u65e0\u6548(\u66f4\u65b0\u540e\u7684\u6570\u636e\u5df2\u7ecf\u5199\u5165\u65b0\u5730\u5740\u4e86\uff0c\u65e7\u5730\u5740\u7684\u6570\u636e\u81ea\u7136\u5c31\u65e0\u6548\u4e86)\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/ftl_1.gif\" alt=\"\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/ftl_2.gif\" alt=\"\" \/><\/p>\n<p>\u6709\u4e86 FTL\uff0c\u6211\u4eec\u624d\u80fd\u50cf\u673a\u68b0\u786c\u76d8\u90a3\u6837\u64cd\u4f5c SSD\u3002\u4f46\u662f\u5f88\u660e\u663e\uff0c\u8fd9\u79cd\u65b9\u6cd5\u6709\u4e2a\u5f88\u5927\u7684\u7f3a\u61be\uff1a\u8ddf\u8e2a\u5f00\u9500\u3002\u6240\u4ee5 FTL \u7684\u8f6c\u6362\u901f\u5ea6\u76f4\u63a5\u5f71\u54cd SSD \u7684\u8bfb\u5199\u6027\u80fd\u3002<\/p>\n<h3>\u78e8\u635f\u5e73\u8861(Wear leveling)<\/h3>\n<p>\u7b80\u5355\u8bf4\u6765\uff0c\u78e8\u635f\u5e73\u8861\u662f\u786e\u4fdd\u95ea\u5b58\u7684\u6bcf\u4e2a\u5757\u88ab\u5199\u5165\u7684\u6b21\u6570\u76f8\u7b49\u7684\u4e00\u79cd\u673a\u5236\u3002<\/p>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5728 NAND \u5757\u91cc\u7684\u6570\u636e\u66f4\u65b0\u9891\u5ea6\u662f\u4e0d\u540c\u7684\uff1a\u6709\u4e9b\u4f1a\u7ecf\u5e38\u66f4\u65b0\uff0c\u6709\u4e9b\u5219\u4e0d\u5e38\u66f4\u65b0\u3002\u5f88\u660e\u663e\uff0c\u90a3\u4e9b\u7ecf\u5e38\u66f4\u65b0\u7684\u6570\u636e\u6240\u5360\u7528\u7684\u5757\u4f1a\u88ab\u5feb\u901f\u7684\u78e8\u635f\u6389\uff0c\u800c\u4e0d\u5e38\u66f4\u65b0\u7684\u6570\u636e\u5360\u7528\u7684\u5757\u78e8\u635f\u5c31\u5c0f\u5f97\u591a\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u8ba9\u6bcf\u4e2a\u5757\u7684\u7f16\u7a0b(\u64e6\u5199)\u6b21\u6570\u5c3d\u53ef\u80fd\u4fdd\u6301\u4e00\u81f4\uff1a\u8fd9\u5c31\u662f\u9700\u8981\u5bf9\u6bcf\u4e2a\u9875\u7684\u8bfb\u53d6\/\u7f16\u7a0b\u64cd\u4f5c\u8fdb\u884c\u76d1\u6d4b\uff0c\u5728\u6700\u4e50\u89c2\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e2a\u6280\u672f\u4f1a\u8ba9\u5168\u76d8\u7684\u9897\u7c92\u7269\u7406\u78e8\u635f\u7a0b\u5ea6\u76f8\u540c\u5e76\u540c\u65f6\u62a5\u5e9f\u3002<\/p>\n<p>\u78e8\u635f\u5e73\u8861\u7b97\u6cd5\u5206\u9759\u6001\u548c\u52a8\u6001\u3002\u52a8\u6001\u78e8\u635f\u7b97\u6cd5\u662f\u57fa\u672c\u7684\u78e8\u635f\u7b97\u6cd5\uff1a\u53ea\u6709\u7528\u6237\u5728\u4f7f\u7528\u4e2d\u66f4\u65b0\u7684\u6587\u4ef6\u5360\u7528\u7684\u7269\u7406\u9875\u5730\u5740\u88ab\u78e8\u635f\u5e73\u8861\u4e86\u3002\u800c\u9759\u6001\u78e8\u635f\u7b97\u6cd5\u662f\u66f4\u9ad8\u7ea7\u7684\u78e8\u635f\u7b97\u6cd5\uff1a\u5728\u52a8\u6001\u78e8\u635f\u7b97\u6cd5\u7684\u57fa\u7840\u4e0a\uff0c\u589e\u52a0\u4e86\u5bf9\u4e8e\u90a3\u4e9b\u4e0d\u5e38\u66f4\u65b0\u7684\u6587\u4ef6\u5360\u7528\u7684\u7269\u7406\u5730\u5740\u8fdb\u884c\u78e8\u635f\u5e73\u8861\uff0c\u8fd9\u624d\u7b97\u662f\u771f\u6b63\u7684\u5168\u76d8\u78e8\u635f\u5e73\u8861\u3002\u7b80\u5355\u70b9\u8bf4\u6765\uff0c\u52a8\u6001\u7b97\u6cd5\u5c31\u662f\u6bcf\u6b21\u90fd\u6311\u6700\u5e74\u8f7b\u7684 NAND \u5757\u6765\u7528\uff0c\u8001\u7684 NAND \u5757\u5c3d\u91cf\u4e0d\u7528\u3002\u9759\u6001\u7b97\u6cd5\u5c31\u662f\u628a\u957f\u671f\u6ca1\u6709\u4fee\u6539\u7684\u8001\u6570\u636e\u4ece\u4e00\u4e2a\u5e74\u8f7b NAND \u5757\u91cc\u9762\u642c\u51fa\u6765\uff0c\u91cd\u65b0\u627e\u4e2a\u6700\u8001\u7684 NAND \u5757\u653e\u7740\uff0c\u8fd9\u6837\u5e74\u8f7b\u7684 NAND \u5757\u5c31\u80fd\u518d\u5ea6\u8fdb\u5165\u7ecf\u5e38\u4f7f\u7528\u533a\u3002\u6982\u5ff5\u5f88\u7b80\u5355\uff0c\u4f46\u5b9e\u73b0\u5374\u975e\u5e38\u7684\u590d\u6742\uff0c\u7279\u522b\u662f\u9759\u6001\u3002<\/p>\n<p>\u5c3d\u7ba1\u78e8\u635f\u5747\u8861\u7684\u76ee\u7684\u662f\u907f\u514d\u6570\u636e\u91cd\u590d\u5728\u67d0\u4e2a\u7a7a\u95f4\u5199\u5165\uff0c\u4ee5\u4fdd\u8bc1\u5404\u4e2a\u5b58\u50a8\u533a\u57df\u5185\u78e8\u635f\u7a0b\u5ea6\u57fa\u672c\u4e00\u81f4\uff0c\u4ece\u800c\u8fbe\u5230\u5ef6\u957f\u56fa\u6001\u786c\u76d8\u7684\u76ee\u7684\u3002\u4f46\u662f\uff0c\u5b83\u5bf9\u56fa\u6001\u786c\u76d8\u7684\u6027\u80fd\u6709\u4e0d\u5229\u5f71\u54cd\u3002<\/p>\n<h3>\u5783\u573e\u56de\u6536(Garbage collection)<\/h3>\n<p>\u7531\u524d\u9762\u7684\u78e8\u635f\u5e73\u8861\u673a\u5236\u77e5\u9053\uff0c\u78e8\u635f\u5e73\u8861\u7684\u6267\u884c\u9700\u8981\u6709\u201c\u7a7a\u767d\u5757\u201d\u6765\u5199\u5165\u66f4\u65b0\u540e\u7684\u6570\u636e\u3002\u5f53\u53ef\u4ee5\u76f4\u63a5\u5199\u5165\u6570\u636e\u7684\u201c\u5907\u7528\u7a7a\u767d\u5757\u201d\u6570\u91cf\u4f4e\u4e8e\u4e00\u4e2a\u9600\u503c\u540e\uff0cSSD\u4e3b\u63a7\u5236\u5668\u5c31\u4f1a\u628a\u90a3\u4e9b\u5305\u542b\u65e0\u6548\u6570\u636e\u7684\u5757\u91cc\u7684\u6240\u6709\u6709\u6548\u6570\u636e\u5408\u5e76\u8d77\u6765\u5199\u5230\u65b0\u7684\u201c\u7a7a\u767d\u5757\u201d\u4e2d\uff0c\u7136\u540e\u64e6\u9664\u8fd9\u4e2a\u5757\u4ee5\u589e\u52a0\u201c\u5907\u7528\u7a7a\u767d\u5757\u201d\u7684\u6570\u91cf\u3002\u8fd9\u4e2a\u64cd\u4f5c\u5c31\u662fSSD\u7684\u5783\u573e\u56de\u6536\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/gc_1.jpg\" alt=\"\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/gc_2.jpg\" alt=\"\" \/><\/p>\n<p>\u6709\u4e09\u79cd\u5783\u573e\u56de\u6536\u7b56\u7565\uff1a<\/p>\n<p>\u95f2\u7f6e\u5783\u573e\u56de\u6536\uff1a\u5f88\u660e\u663e\u5728\u8fdb\u884c\u5783\u573e\u56de\u6536\u65f6\u5019\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u4e3b\u63a7\u5904\u7406\u80fd\u529b\u548c\u5e26\u5bbd\u9020\u6210\u5904\u7406\u7528\u6237\u8bf7\u6c42\u7684\u6027\u80fd\u4e0b\u964d\uff0cSSD \u4e3b\u63a7\u5236\u5668\u53ef\u4ee5\u8bbe\u7f6e\u5728\u7cfb\u7edf\u95f2\u7f6e\u65f6\u5019\u505a\u201c\u9884\u5148\u201d\u5783\u573e\u56de\u6536(\u63d0\u524d\u505a\u5783\u573e\u56de\u6536\u64cd\u4f5c)\uff0c\u4fdd\u8bc1\u4e00\u5b9a\u6570\u91cf\u7684\"\u5907\u7528\u7a7a\u767d\u5757\"\uff0c\u8ba9 SSD \u5728\u8fd0\u884c\u65f6\u5019\u80fd\u591f\u4fdd\u6301\u8f83\u9ad8\u7684\u6027\u80fd\u3002\u95f2\u7f6e\u5783\u573e\u56de\u6536\u7684\u7f3a\u70b9\u662f\u4f1a\u589e\u52a0\u989d\u5916\u7684\"\u5199\u5165\u653e\u5927\"\uff0c\u56e0\u4e3a\u4f60\u521a\u521a\u5783\u573e\u56de\u6536\u7684\"\u6709\u6548\u6570\u636e\"\uff0c\u4e5f\u8bb8\u9a6c\u4e0a\u5c31\u4f1a\u88ab\u66f4\u65b0\u540e\u7684\u6570\u636e\u66ff\u4ee3\u800c\u53d8\u6210\"\u65e0\u6548\u6570\u636e\"\uff0c\u8fd9\u6837\u5c31\u9020\u6210\u4e4b\u524d\u7684\u5783\u573e\u56de\u6536\u505a\u65e0\u7528\u529f\u4e86\u3002<\/p>\n<p>\u88ab\u52a8\u5783\u573e\u56de\u6536\uff1a\u6bcf\u4e2a SSD \u90fd\u652f\u6301\u7684\u6280\u672f\uff0c\u4f46\u662f\u5bf9\u4e3b\u63a7\u5236\u5668\u7684\u6027\u80fd\u63d0\u51fa\u4e86\u5f88\u9ad8\u7684\u8981\u6c42\uff0c\u9002\u5408\u5728\u670d\u52a1\u5668\u91cc\u7528\u5230\uff0cSandForce \u7684\u4e3b\u63a7\u5c31\u5c5e\u8fd9\u7c7b\u3002\u5728\u5783\u573e\u56de\u6536\u64cd\u4f5c\u6d88\u8017\u5e26\u5bbd\u548c\u5904\u7406\u80fd\u529b\u7684\u540c\u65f6\u5904\u7406\u7528\u6237\u64cd\u4f5c\u6570\u636e\uff0c\u5982\u679c\u6ca1\u6709\u8db3\u591f\u5f3a\u52b2\u7684\u4e3b\u63a7\u5236\u5668\u6027\u80fd\u5219\u4f1a\u9020\u6210\u660e\u663e\u7684\u901f\u5ea6\u4e0b\u964d\u3002\u8fd9\u5c31\u662f\u4e3a\u5565\u5f88\u591a SSD \u5728\u5168\u76d8\u5199\u6ee1\u4e00\u6b21\u540e\u4f1a\u51fa\u73b0\u6027\u80fd\u4e0b\u964d\u7684\u9053\u7406\uff0c\u56e0\u4e3a\u8981\u60f3\u7ee7\u7eed\u5199\u5165\u6570\u636e\u5c31\u5fc5\u987b\u8981\u8fb9\u5783\u573e\u56de\u6536\u8fb9\u505a\u5199\u5165\u3002<\/p>\n<p>\u624b\u52a8\u5783\u573e\u56de\u6536\uff1a\u7528\u6237\u81ea\u5df1\u624b\u52a8\u9009\u62e9\u5408\u9002\u7684\u65f6\u673a\u8fd0\u884c\u5783\u573e\u56de\u6536\u8f6f\u4ef6\uff0c\u6267\u884c\u5783\u573e\u56de\u6536\u64cd\u4f5c\u3002<\/p>\n<p>\u53ef\u4ee5\u60f3\u8c61\uff0c\u5982\u679c\u7cfb\u7edf\u7ecf\u5e38\u8fdb\u884c\u5783\u573e\u56de\u6536\u5904\u7406\uff0c\u9891\u7e41\u7684\u5c06\u4e00\u4e9b\u533a\u5757\u8fdb\u884c\u64e6\u9664\u64cd\u4f5c\uff0c\u90a3\u4e48 SSD \u7684\u5bff\u547d\u53cd\u800c\u4e5f\u4f1a\u8fdb\u4e00\u6b65\u4e0b\u964d\u3002\u7531\u6b64\u628a\u63e1\u8fd9\u4e2a\u5783\u573e\u56de\u6536\u7684\u9891\u7e41\u7a0b\u5ea6\uff0c\u540c\u65f6\u786e\u4fdd SSD \u4e2d\u7684\u95ea\u5b58\u82af\u7247\u62e5\u6709\u66f4\u9ad8\u7684\u4f7f\u7528\u5bff\u547d\uff0c\u8fd9\u786e\u5b9e\u9700\u8981\u627e\u5230\u4e00\u4e2a\u5b8c\u7f8e\u7684\u5e73\u8861\u70b9\u3002\u6240\u4ee5\uff0cSSD \u5fc5\u987b\u8981\u652f\u6301 Trim \u6280\u672f\uff0c\u4e0d\u7136 GC \u5c31\u663e\u4e0d\u51fa\u4ed6\u7684\u4f18\u52bf\u4e86\u3002<\/p>\n<h3>Trim<\/h3>\n<p>Trim \u662f\u4e00\u4e2a ATA \u6307\u4ee4\uff0c\u5f53\u64cd\u4f5c\u7cfb\u7edf\u5220\u9664\u6587\u4ef6\u6216\u683c\u5f0f\u5316\u7684\u65f6\u5019\uff0c\u7531\u64cd\u4f5c\u7cfb\u7edf\u540c\u65f6\u628a\u8fd9\u4e2a\u6587\u4ef6\u5730\u5740\u53d1\u9001\u7ed9 SSD \u7684\u4e3b\u63a7\u5236\u5668\uff0c\u8ba9\u4e3b\u63a7\u5236\u5668\u77e5\u9053\u8fd9\u4e2a\u5730\u5740\u7684\u6570\u636e\u65e0\u6548\u4e86\u3002<\/p>\n<p>\u5f53\u4f60\u5220\u9664\u4e00\u4e2a\u6587\u4ef6\u7684\u65f6\u5019\uff0c\u6587\u4ef6\u7cfb\u7edf\u5176\u5b9e\u5e76\u4e0d\u4f1a\u771f\u6b63\u53bb\u5220\u9664\u5b83\uff0c\u800c\u53ea\u662f\u628a\u8fd9\u4e2a\u6587\u4ef6\u5730\u5740\u6807\u8bb0\u4e3a\u201c\u5df2\u5220\u9664\u201d\uff0c\u53ef\u4ee5\u88ab\u518d\u6b21\u4f7f\u7528\uff0c\u8fd9\u610f\u5473\u7740\u8fd9\u4e2a\u6587\u4ef6\u5360\u7684\u5730\u5740\u5df2\u7ecf\u662f\u201c\u65e0\u6548\u201d\u7684\u4e86\u3002\u8fd9\u5c31\u4f1a\u5e26\u6765\u4e00\u4e2a\u95ee\u9898\uff0c\u786c\u76d8\u5e76\u4e0d\u77e5\u9053\u64cd\u4f5c\u7cfb\u7edf\u628a\u8fd9\u4e2a\u5730\u5740\u6807\u8bb0\u4e3a\u201c\u5df2\u5220\u9664\u201d\u4e86\uff0c\u673a\u68b0\u76d8\u7684\u8bdd\u65e0\u6240\u8c13\uff0c\u56e0\u4e3a\u53ef\u4ee5\u76f4\u63a5\u5728\u8fd9\u4e2a\u5730\u5740\u4e0a\u91cd\u65b0\u8986\u76d6\u5199\u5165\uff0c\u4f46\u662f\u5230\u4e86 SSD \u4e0a\u95ee\u9898\u5c31\u6765\u4e86\u3002NAND \u9700\u8981\u5148\u64e6\u9664\u624d\u80fd\u518d\u6b21\u5199\u5165\u6570\u636e\uff0c\u8981\u5f97\u5230\u7a7a\u95f2\u7684 NAND \u7a7a\u95f4\uff0cSSD \u5fc5\u987b\u590d\u5236\u6240\u6709\u7684\u6709\u6548\u9875\u5230\u65b0\u7684\u7a7a\u95f2\u5757\u91cc\uff0c\u5e76\u64e6\u9664\u65e7\u5757(\u5783\u573e\u56de\u6536)\u3002\u5982\u679c\u6ca1\u6709 Trim \u6307\u4ee4\uff0c\u610f\u5473\u7740 SSD \u4e3b\u63a7\u5236\u5668\u4e0d\u77e5\u9053\u8fd9\u4e2a\u9875\u662f\u201c\u65e0\u6548\u201d\u7684\uff0c\u9664\u975e\u518d\u6b21\u88ab\u64cd\u4f5c\u7cfb\u7edf\u8981\u6c42\u8986\u76d6\u4e0a\u53bb\u3002<\/p>\n<p>Trim \u53ea\u662f\u6761\u6307\u4ee4\uff0c\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u544a\u8bc9 SSD \u4e3b\u63a7\u5236\u5668\u8fd9\u4e2a\u9875\u5df2\u7ecf\u201c\u65e0\u6548\u201d\u4e86\u3002Trim \u4f1a\u51cf\u5c11\u5199\u5165\u653e\u5927\uff0c\u56e0\u4e3a\u4e3b\u63a7\u5236\u5668\u4e0d\u9700\u8981\u590d\u5236\u201c\u65e0\u6548\u201d\u7684\u9875(\u6ca1 Trim \u5c31\u662f\u201c\u6709\u6548\u201d\u7684)\u5230\u7a7a\u767d\u5757\u91cc\uff0c\u8fd9\u540c\u65f6\u4ee3\u8868\u590d\u5236\u7684\u201c\u6709\u6548\u201d\u9875\u53d8\u5c11\u4e86\uff0c\u5783\u573e\u56de\u6536\u7684\u6548\u7387\u548c SSD \u6027\u80fd\u4e5f\u63d0\u5347\u4e86\u3002<\/p>\n<p>Trim \u80fd\u5927\u91cf\u51cf\u5c11\u4f2a\u6709\u6548\u9875\u7684\u6570\u91cf\uff0c\u5b83\u80fd\u5927\u5927\u63d0\u5347\u5783\u573e\u56de\u6536\u7684\u6548\u7387\u3002<\/p>\n<p>\u76ee\u524d\uff0c\u652f\u6301 Trim \u9700\u8981\u4e09\u4e2a\u8981\u7d20\uff0c\u7f3a\u4e00\u4e0d\u53ef\uff1a<\/p>\n<ul>\n<li>\u7cfb\u7edf\uff1a \u64cd\u4f5c\u7cfb\u7edf\u5fc5\u987b\u4f1a\u53d1\u9001 Trim \u6307\u4ee4\uff0cWin7, Win2008R2 , Linux-2.6.33 \u4ee5\u4e0a\u3002<\/li>\n<li>\u56fa\u4ef6\uff1a SSD \u7684\u5382\u5546\u5728\u56fa\u4ef6\u91cc\u8981\u653e\u6709 Trim \u7b97\u6cd5\uff0c\u4e5f\u5c31\u662f SSD \u7684\u4e3b\u63a7\u5236\u5668\u5fc5\u987b\u8ba4\u8bc6 Trim \u6307\u4ee4\u3002<\/li>\n<li>\u9a71\u52a8\uff1a \u63a7\u5236\u5668\u9a71\u52a8\u5fc5\u987b\u8981\u652f\u6301 Trim \u6307\u4ee4\u7684\u4f20\u8f93\uff0c\u4e5f\u5c31\u662f\u80fd\u591f\u5c06 Trim \u6307\u4ee4\u4f20\u8f93\u5230 SSD \u63a7\u5236\u5668\u3002MS \u7684\u9a71\u52a8\uff0cIntel \u7684 AHCI \u9a71\u52a8\u76ee\u524d\u652f\u6301\u3002\u522b\u7684\u8981\u770b\u4e4b\u540e\u7684\u66f4\u65b0\u4e86\u3002<\/li>\n<\/ul>\n<p>\u76ee\u524d\uff0cRAID \u9635\u5217\u91cc\u7684\u76d8\u660e\u786e\u4e0d\u652f\u6301 TRIM\uff0c\u4e0d\u8fc7 RAID \u9635\u5217\u652f\u6301 GC\u3002<\/p>\n<h3>NCQ<\/h3>\n<p>NCQ(Native Command Queuing)\u7684\u610f\u601d\u662f\u539f\u751f\u6307\u4ee4\u6392\u5e8f\u3002\u4f7f\u7528 NCQ \u6280\u672f\u53ef\u4ee5\u5bf9\u5c06\u8981\u8bfb\u53d6\u7684\u6587\u4ef6\u8fdb\u884c\u5185\u90e8\u6392\u5e8f\uff0c\u7136\u540e\u5bf9\u6587\u4ef6\u7684\u6392\u5e8f\u505a\u6700\u4f73\u5316\u7ebf\u8def\u8bfb\u5199\uff0c\u8fbe\u5230\u63d0\u5347\u8bfb\u5199\u6548\u7387\u7684\u76ee\u5730\u3002NCQ \u6700\u65e9\u662f SCSI \u7684\u6807\u51c6\u4e4b\u4e00\uff0c\u53ea\u662f\u90a3\u65f6\u5019\u4e0d\u53eb NCQ\uff0c\u5bf9\u8fd9\u4e2a\u6807\u51c6\u7a0d\u4f5c\u4fee\u6539\u540e\uff0c\u5728 SATA \u7684\u5e94\u7528\u4e0a\u5c31\u53eb\u505a NCQ \u4e86\uff0cSAS \u63a5\u53e3\u4e5f\u652f\u6301 NCQ\u3002SSD \u867d\u7136\u6ca1\u6709\u673a\u68b0\u81c2\uff0c\u4f46\u662f SSD \u6709\u591a\u901a\u9053\u3002\u5f00\u542f NCQ \u540e\uff0cSSD \u4e3b\u63a7\u5236\u5668\u4f1a\u6839\u636e\u6570\u636e\u7684\u8bf7\u6c42\u548c NAND \u5185\u90e8\u6570\u636e\u7684\u5206\u5e03\uff0c\u5145\u5206\u5229\u7528\u4e3b\u63a7\u5236\u5668\u901a\u9053\u7684\u5e26\u5bbd\u8fbe\u5230\u63d0\u5347\u6027\u80fd\u7684\u76ee\u5730\uff0c\u6240\u4ee5 NCQ \u5bf9 SSD \u4e5f\u6709\u5e2e\u52a9\uff0c\u7406\u60f3\u72b6\u51b5\u4e0b\u6027\u80fd\u63d0\u5347\u53ef\u8fbe5-10\u500d\u3002\u76ee\u524d\u539f\u751f\u652f\u6301 SATA \u7684 SSD \u90fd\u80fd\u652f\u6301 NCQ\u3002\u5f53\u7136\uff0c\u8981\u5f00\u542fNCQ\uff0c\u5fc5\u987b\u8981\u4f7f\u7528 AHCI \u6a21\u5f0f\u3002<\/p>\n<h3>\u9884\u7559\u7a7a\u95f4(Over-provisioning)<\/h3>\n<p>\u9884\u7559\u7a7a\u95f4\u662f\u6307\u7528\u6237\u4e0d\u53ef\u64cd\u4f5c\u7684\u5bb9\u91cf\uff0c\u4e3a\u5b9e\u9645\u7269\u7406\u95ea\u5b58\u5bb9\u91cf\u51cf\u53bb\u7528\u6237\u53ef\u7528\u5bb9\u91cf\u3002\u8fd9\u5757\u533a\u57df\u4e00\u822c\u88ab\u7528\u6765\u505a\u4f18\u5316\uff0c\u5305\u62ec\u78e8\u635f\u5747\u8861\uff0cGC\u548c\u574f\u5757\u6620\u5c04\u3002<\/p>\n<p>\u7b2c\u4e00\u5c42\u4e3a\u56fa\u5b9a\u76847.37%\uff0c\u8fd9\u4e2a\u6570\u5b57\u662f\u5982\u4f55\u5f97\u51fa\u7684\u54ea\uff1f\u6211\u4eec\u77e5\u9053\u673a\u68b0\u786c\u76d8\u548c SSD \u7684\u5382\u5546\u5bb9\u91cf\u662f\u8fd9\u6837\u7b97\u7684\uff0c1GB \u662f1,000,000,000\u5b57\u8282(10\u76849 \u6b21\u65b9)\uff0c\u4f46\u662f\u95ea\u5b58\u7684\u5b9e\u9645\u5bb9\u91cf\u662f\u6bcf GB=1,073,741,824\uff0c(2\u768430\u6b21\u65b9) \uff0c\u4e24\u8005\u76f8\u5dee7.37%\u3002\u6240\u4ee5\u8bf4\u5047\u8bbe1\u5757 128GB \u7684 SSD\uff0c\u7528\u6237\u5f97\u5230\u7684\u5bb9\u91cf\u662f 128,000,000,000 \u5b57\u8282\uff0c\u591a\u51fa\u6765\u7684\u90a3\u4e2a 7.37% \u5c31\u88ab\u4e3b\u63a7\u56fa\u4ef6\u7528\u505aOP\u4e86\u3002<\/p>\n<p>\u7b2c\u4e8c\u5c42\u6765\u81ea\u5236\u9020\u5546\u7684\u8bbe\u7f6e\uff0c\u901a\u5e38\u4e3a 0%\uff0c7%\uff0c28% \u7b49\uff0c\u6253\u4e2a\u6bd4\u65b9\uff0c\u5bf9\u4e8e 128G \u9897\u7c92\u7684 SandForce \u4e3b\u63a7 SSD\uff0c\u5e02\u573a\u4e0a\u4f1a\u6709 120G \u548c 100G \u4e24\u79cd\u578b\u53f7\u5356\uff0c\u8fd9\u4e2a\u53d6\u51b3\u4e8e\u5382\u5546\u7684\u56fa\u4ef6\u8bbe\u7f6e\uff0c\u8fd9\u4e2a\u5bb9\u91cf\u4e0d\u5305\u62ec\u4e4b\u524d\u7684\u7b2c\u4e00\u5c42 7.37% \u3002<\/p>\n<p>\u7b2c\u4e09\u5c42\u662f\u7528\u6237\u5728\u65e5\u5e38\u4f7f\u7528\u4e2d\u53ef\u4ee5\u5206\u914d\u7684\u9884\u7559\u7a7a\u95f4\uff0c\u7528\u6237\u53ef\u4ee5\u5728\u5206\u533a\u7684\u65f6\u5019\uff0c\u4e0d\u5206\u5230\u5b8c\u5168\u7684 SSD \u5bb9\u91cf\u6765\u8fbe\u5230\u8fd9\u4e2a\u76ee\u7684\u3002\u4e0d\u8fc7\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u9700\u8981\u5148\u505a\u5b89\u5168\u64e6\u9664(Secure Erase)\uff0c\u4ee5\u4fdd\u8bc1\u6b64\u7a7a\u95f4\u786e\u5b9e\u6ca1\u6709\u88ab\u4f7f\u7528\u8fc7\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/op_1.jpg\" alt=\"\" \/><\/p>\n<p>\u9884\u7559\u7a7a\u95f4\u867d\u7136\u8ba9 SSD \u7684\u53ef\u7528\u5bb9\u91cf\u5c0f\u4e86\uff0c\u4f46\u662f\u5e26\u6765\u4e86\u51cf\u5c11\u5199\u5165\u653e\u5927\u3001\u63d0\u9ad8\u8010\u4e45\u6027\u3001\u63d0\u9ad8\u6027\u80fd\u7684\u6548\u679c\u3002\u6839\u636e\u7ecf\u9a8c\uff0c\u9884\u7559\u7a7a\u95f4\u5728 20%-35% \u4e4b\u95f4\u662f\u6700\u4f73\u5e73\u8861\u70b9\u3002<\/p>\n<h3>\u5199\u5165\u653e\u5927(Write amplification)<\/h3>\n<p>\u56e0\u4e3a\u95ea\u5b58\u5fc5\u987b\u5148\u64e6\u9664(\u4e5f\u53eb\u7f16\u7a0b)\u624d\u80fd\u5199\u5165\uff0c\u5728\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u79fb\u52a8\u6216\u8986\u76d6\u7528\u6237\u6570\u636e\u548c\u5143\u6570\u636e(metadata)\u4e0d\u6b62\u4e00\u6b21\u3002\u8fd9\u4e9b\u989d\u5916\u7684\u64cd\u4f5c\uff0c\u4e0d\u4f46\u589e\u52a0\u4e86\u5199\u5165\u6570\u636e\u91cf\uff0c\u51cf\u5c11\u4e86SSD\u7684\u4f7f\u7528\u5bff\u547d\uff0c\u800c\u4e14\u8fd8\u5403\u5149\u4e86\u95ea\u5b58\u7684\u5e26\u5bbd\uff0c\u95f4\u63a5\u5730\u5f71\u54cd\u4e86\u968f\u673a\u5199\u5165\u6027\u80fd\u3002\u8fd9\u79cd\u6548\u5e94\u5c31\u53eb\u5199\u5165\u653e\u5927(Write amplification)\u3002\u4e00\u4e2a\u4e3b\u63a7\u7684\u597d\u574f\u4e3b\u8981\u4f53\u73b0\u5728\u5199\u5165\u653e\u5927\u4e0a\u3002<\/p>\n<p>\u6bd4\u5982\u6211\u8981\u5199\u5165\u4e00\u4e2a 4KB \u7684\u6570\u636e\uff0c\u6700\u574f\u7684\u60c5\u51b5\u662f\uff0c\u4e00\u4e2a\u5757\u91cc\u5df2\u7ecf\u6ca1\u6709\u5e72\u51c0\u7a7a\u95f4\u4e86\uff0c\u4f46\u662f\u6709\u65e0\u6548\u6570\u636e\u53ef\u4ee5\u64e6\u9664\uff0c\u6240\u4ee5\u4e3b\u63a7\u5c31\u628a\u6240\u6709\u7684\u6570\u636e\u8bfb\u5230\u7f13\u5b58\uff0c\u64e6\u9664\u5757\uff0c\u4ece\u7f13\u5b58\u91cc\u66f4\u65b0\u6574\u4e2a\u5757\u7684\u6570\u636e\uff0c\u518d\u628a\u65b0\u6570\u636e\u5199\u56de\u53bb\u3002\u8fd9\u4e2a\u64cd\u4f5c\u5e26\u6765\u7684\u5199\u5165\u653e\u5927\u5c31\u662f\uff1a\u6211\u5b9e\u9645\u51994K\u7684\u6570\u636e\uff0c\u9020\u6210\u4e86\u6574\u4e2a\u5757(1024KB)\u7684\u5199\u5165\u64cd\u4f5c\uff0c\u90a3\u5c31\u662f256\u500d\u653e\u5927\u3002\u540c\u65f6\u5e26\u6765\u4e86\u539f\u672c\u53ea\u9700\u8981\u7b80\u5355\u7684\u51994KB\u7684\u64cd\u4f5c\u53d8\u6210\u95ea\u5b58\u8bfb\u53d6(1024KB)\uff0c\u7f13\u5b58\u6539(4KB)\uff0c\u95ea\u5b58\u64e6(1024KB)\uff0c\u95ea\u5b58\u5199(1024KB)\uff0c\u9020\u6210\u4e86\u5ef6\u8fdf\u5927\u5927\u589e\u52a0\uff0c\u901f\u5ea6\u6025\u5267\u4e0b\u964d\u4e5f\u5c31\u662f\u81ea\u7136\u7684\u4e8b\u4e86\u3002\u6240\u4ee5\uff0c\u5199\u5165\u653e\u5927\u662f\u5f71\u54cd SSD \u968f\u673a\u5199\u5165\u6027\u80fd\u548c\u5bff\u547d\u7684\u5173\u952e\u56e0\u7d20\u3002<\/p>\n<p>\u7528100%\u968f\u673a4KB\u6765\u5199\u5165 SSD\uff0c\u5bf9\u4e8e\u76ee\u524d\u7684\u5927\u591a\u6570 SSD \u4e3b\u63a7\u800c\u8a00\uff0c\u5728\u6700\u7cdf\u7cd5\u7684\u60c5\u51b5\u4e0b\uff0c\u5199\u5165\u653e\u5927\u7684\u5b9e\u9645\u503c\u53ef\u80fd\u4f1a\u8fbe\u5230\u6216\u8d85\u8fc720\u500d\u3002\u5f53\u7136\uff0c\u7528\u6237\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u5b9a\u7684\u9884\u7559\u7a7a\u95f4\u6765\u51cf\u5c11\u5199\u5165\u653e\u5927\uff0c\u5047\u8bbe\u4f60\u6709\u4e2a 128G \u7684 SSD\uff0c\u4f60\u53ea\u5206\u4e86 64G \u7684\u533a\u4f7f\u7528\uff0c\u90a3\u4e48\u6700\u574f\u60c5\u51b5\u4e0b\u7684\u5199\u5165\u653e\u5927\u5c31\u80fd\u51cf\u5c11\u7ea63\u500d\u3002<\/p>\n<p>\u8bb8\u591a\u56e0\u7d20\u5f71\u54cd SSD \u7684\u5199\u5165\u653e\u5927\u3002\u4e0b\u9762\u5217\u51fa\u4e86\u4e3b\u8981\u56e0\u7d20\uff0c\u4ee5\u53ca\u5b83\u4eec\u5982\u4f55\u5f71\u54cd\u5199\u5165\u653e\u5927\u3002<\/p>\n<ol>\n<li>\u5783\u573e\u56de\u6536\u867d\u7136\u589e\u52a0\u4e86\u5199\u5165\u653e\u5927(\u88ab\u52a8\u5783\u573e\u56de\u6536\u4e0d\u5f71\u54cd\uff0c\u95f2\u7f6e\u5783\u573e\u56de\u6536\u5f71\u54cd)\uff0c\u4f46\u662f\u901f\u5ea6\u6709\u63d0\u5347\u3002<\/li>\n<li>\u9884\u7559\u7a7a\u95f4\u53ef\u4ee5\u51cf\u5c11\u5199\u5165\u653e\u5927\uff0c\u9884\u7559\u7a7a\u95f4\u8d8a\u5927\uff0c\u5199\u5165\u653e\u5927\u8d8a\u4f4e\u3002<\/li>\n<li>\u5f00\u542f TRIM \u6307\u4ee4\u540e\u53ef\u4ee5\u51cf\u5c11\u5199\u5165\u653e\u5927<\/li>\n<li>\u7528\u6237\u4f7f\u7528\u4e2d\u6ca1\u6709\u7528\u5230\u7684\u7a7a\u95f4\u8d8a\u5927\uff0c\u5199\u5165\u653e\u5927\u8d8a\u4f4e(\u9700\u8981\u6709 Trim \u652f\u6301)\u3002<\/li>\n<li>\u6301\u7eed\u5199\u5165\u53ef\u4ee5\u51cf\u5c11\u5199\u5165\u653e\u5927\u3002\u7406\u8bba\u4e0a\u6765\u8bf4\uff0c\u6301\u7eed\u5199\u5165\u7684\u5199\u5165\u653e\u5927\u4e3a1\uff0c\u4f46\u662f\u67d0\u4e9b\u56e0\u7d20\u8fd8\u662f\u4f1a\u5f71\u54cd\u8fd9\u4e2a\u6570\u503c\u3002<\/li>\n<li>\u968f\u673a\u5199\u5165\u5c06\u4f1a\u5927\u5927\u63d0\u5347\u5199\u5165\u653e\u5927\uff0c\u56e0\u4e3a\u4f1a\u5199\u5165\u5f88\u591a\u975e\u8fde\u7eed\u7684 LBA\u3002<\/li>\n<li>\u78e8\u635f\u5e73\u8861\u673a\u5236\u76f4\u63a5\u63d0\u9ad8\u4e86\u5199\u5165\u653e\u5927<\/li>\n<\/ol>\n<h3>DuraWrite<\/h3>\n<p>\u5982\u524d\u6240\u8ff0\uff0cNAND\u95ea\u5b58\u5b58\u50a8\u7684\u4e00\u5927\u7f3a\u9677\u5c31\u662f\u9700\u8981\u5728\u5199\u5165\u65f6\u5bf9\u5b58\u50a8\u7ed3\u6784\u8fdb\u884c\u6574\u7406\uff0c\u8fd9\u5bfc\u81f4\u5b9e\u9645\u4e0a\u5199\u5165\u7684\u6570\u636e\u6bd4\u6211\u4eec\u771f\u6b63\u9700\u8981\u5b58\u50a8\u7684\u6570\u636e\u91cf\u5927\u3002\u5728\u4e00\u6b3e\u6bd4\u8f83\u666e\u901a\u7684\u56fa\u6001\u786c\u76d8\u4e2d\uff0c\u5982\u679c\u4f60\u9700\u8981\u5199\u51651GB\u6570\u636e\uff0c\u5728\u76d8\u5185\u7ed3\u6784\u5df2\u7ecf\u6bd4\u8f83\u6df7\u4e71(\u5b58\u50a8\u3001\u5220\u9664\u3001\u518d\u5b58\u50a8)\u7684\u60c5\u51b5\u4e0b\uff0c\u6700\u540e\u771f\u6b63\u5199\u5165\u7684\u6570\u636e\u91cf\u53ef\u80fd\u9ad8\u8fbe10GB\u751a\u81f320GB\u3002\u771f\u5b9e\u5199\u5165\u6570\u636e\u4e0e\u9700\u8981\u5199\u5165\u6570\u636e\u4e4b\u6bd4\u5373\u4e3a\u201c\u5199\u5165\u653e\u5927\u7387\u201d\u3002<\/p>\n<p>DuraWrite\u662fSandForce\u5f00\u53d1\u7684\u4e00\u79cd\u51cf\u5c11SSD\u5199\u5165\u653e\u5927\u7387\u7684\u6280\u672f\uff1a\u5199\u51651GB\u6570\u636e\u65f6\uff0c\u6700\u7ec8\u5199\u8fdb\u95ea\u5b58\u7684\u53ef\u80fd\u53ea\u6709500MB\u751a\u81f3\u66f4\u5c11\u3002\u6839\u636e\u5382\u65b9\u7684\u6d4b\u8bd5\uff0c\u5b89\u88c5Windows Vista\u548cOffice 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decoding=\"async\" src=\"https:\/\/www.datarelab.com\/blog\/wp-content\/uploads\/2014\/09\/interleaving.jpg\" alt=\"\" \/><\/p>\n<h3>\u65ad\u7535\u4fdd\u62a4<\/h3>\n<p>\u8fd9\u662f\u82f1\u7279\u5c14\u5728\u6240\u6709\u7b2c\u4e09\u4ee3\u56fa\u6001\u786c\u76d8\u4e2d\u91cd\u70b9\u589e\u52a0\u7684\u4e00\u9879\u529f\u80fd\uff0c\u800c\u5728SandForce\u7684\u65b9\u6848\u4e2d\u4f5c\u4e3a\u53ef\u9009\u9879\u63d0\u4f9b\u3002SandForce\u7684\u65b9\u6848\u662f\u914d\u5907\u6709\u4e00\u4e2a0.09F\u7684\u5927\u5bb9\u91cf\u7535\u5bb9\u4ee5\u4fdd\u8bc1\u65ad\u7535\u4e4b\u540e\u6570\u636e\u8fd8\u53ef\u4ee5\u5199\u5165\u5230\u95ea\u5b58\u5f53\u4e2d\uff0c\u9632\u6b62\u4e22\u5931\u3002\u66f4\u8fdb\u4e00\u6b65\uff0c\u8fd8\u53ef\u4ee5\u591a\u7535\u5bb9\u5e76\u8054\u5e26\u6765\u66f4\u597d\u7684\u53ef\u9760\u6027\uff0c\u5c31\u7b97\u5176\u4e2d\u4e00\u4e2a\u574f\u6389\uff0c\u5176\u4ed6\u7684\u7535\u5bb9\u8fd8\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<h3>SMART\u76d1\u63a7<\/h3>\n<p>S.M.A.R.T(Self-Monitoring, Analysis, and Reporting Technology)\u4e2d\u6587\u7684\u610f\u601d\u662f\"\u81ea\u6211\u76d1\u6d4b\u3001\u5206\u6790\u548c\u62a5\u544a\u6280\u672f\"\u3002\u53ef\u4ee5\u7528\u6765\u9884\u6d4b\u5206\u6790\u786c\u76d8\u7684\u6f5c\u5728\u95ee\u9898\u3002\u8fd9\u662f\u4e00\u9879\u5ef6\u7eed\u81ea\u4f20\u7edf\u673a\u68b0\u5f0f\u786c\u76d8\u7684\u6280\u672f\u3002<\/p>\n<p>\u786c\u76d8\u6545\u969c\uff0c\u5206\u4e3a\u5ffd\u7136\u6027\u548c\u6e10\u8fdb\u60272\u79cd\uff1a<\/p>\n<ul>\n<li>\u5ffd\u7136\u6027\uff1a\u6ca1\u6709\u4efb\u4f55\u8ff9\u8c61\uff0c\u5f88\u96be\u9884\u9632\u3002\u6bd4\u5982\u82af\u7247\u70e7\u4e86\u3001\u786c\u76d8\u6454\u4e86\u3001\u4eba\u54c1\u4e0d\u597d\u4e4b\u7c7b\u3002\u8981\u9632\u6b62\u53ea\u6709\u591a\u505a\u5907\u4efd\uff0c\u6216\u8005\u505aRAID\u4e4b\u7c7b\u7684\u5197\u4f59\u3002<\/li>\n<li>\u6e10\u8fdb\u6027\uff1a\u968f\u7740\u65f6\u95f4\u6162\u6162\u53d1\u751f\u7684\uff0c\u53ef\u4ee5\u9884\u5148\u611f\u77e5\u3002\u6bd4\u5982\u58f0\u97f3\u51fa\u73b0\u5f02\u5e38\uff0c\u53ef\u80fd\u662f\u4e3b\u8f74\u9a6c\u8fbe\u78e8\u635f\uff0c\u786c\u76d8\u9010\u6e10\u8001\u5316\u51fa\u73b0\u8bfb\u53d6\u56f0\u96be\u7b49\uff0c\u5728SSD\u4e0a\u4e3b\u8981\u6307\u9897\u7c92\u78e8\u635f\u5ea6\uff0c\u4e0d\u53ef\u4fee\u590d\u9519\u8bef\u6570\u660e\u663e\u589e\u52a0\u7b49\u3002<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u6e10\u8fdb\u6027\u7684\u6545\u969c\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u52a9SMART\u6570\u636e\u53d1\u73b0\u70b9\u6709\u7528\u7684\u4fe1\u606f\u3002\u4f46\u662f\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n<p>\u673a\u68b0\u786c\u76d8\u7684SMART\u8868\u5b9a\u4e49\u5df2\u7ecf\u6709\u81ea\u5df1\u7684\u6807\u51c6\uff0c\u7531\u4e8e\u786c\u76d8\u5382\u5f88\u591a\uff0c\u5f88\u591a\u5382\u5bb6\u5c5e\u6027\u7684\u540d\u5b57\u4e5f\u4e0d\u5c3d\u76f8\u540c\uff0c\u6216\u8005\u67d0\u4e9b\u5382\u724c\u7f3a\u5c11\u67d0\u4e9b\u5c5e\u6027\uff0c\u4f46\u662f\u540c\u4e2aID\u7684\u5b9a\u4e49\u662f\u76f8\u540c\u7684\u3002\u800c\u56fa\u6001\u786c\u76d8\u7684SMART\u8868\u5b9a\u4e49\u5219\u76ee\u524d\u8fd8\u6ca1\u6709\u7edf\u4e00\u6807\u51c6\uff0c\u4e0d\u540c\u5382\u5bb6\u751a\u81f3\u4e0d\u540c\u4e3b\u63a7\u90fd\u6709\u53ef\u80fd\u51fa\u73b0\u76f8\u540cID\u4e0d\u540c\u5b9a\u4e49\uff0c\u6240\u4ee5\u7528\u4e00\u822c\u7684SMART\u8f6f\u4ef6\u67e5\u770b\u662f\u6ca1\u4efb\u4f55\u610f\u4e49\u7684\uff0c\u867d\u7136\u4f60\u53ef\u4ee5\u770b\u5230\u503c\uff0c\u4f46\u662f\u8fd9\u4e2a\u503c\u5bf9\u5e94\u7684ID\u89e3\u91ca\u53ef\u80fd\u5b8c\u5168\u4e0d\u662f\u90a3\u4e48\u56de\u4e8b\u3002<\/p>\n<h2>SSD\u4e0eHDD\u7684\u6bd4\u8f83<\/h2>\n<p>\u5168\u9762\u5c06SSD\u548cHDD\u8fdb\u884c\u5bf9\u6bd4\u662f\u5f88\u590d\u6742\u7684\uff0c\u4f20\u7edf\u7684HDD\u6027\u80fd\u8bc4\u6d4b\u4e3b\u8981\u5173\u6ce8\u5176\u56fa\u6709\u7684\u5f31\u70b9\uff0c\u6bd4\u5982\u5bfb\u9053\u65f6\u95f4\u548c\u8f6c\u901f\u3002SSD\u5e76\u4e0d\u65cb\u8f6c\uff0c\u4e5f\u4e0d\u5b58\u5728\u5bfb\u9053\u7684\u95ee\u9898\uff0c\u6545\u800c\u5728\u8fd9\u4e9b\u4f20\u7edf\u6d4b\u8bd5\u4e2d\uff0c\u53ef\u4ee5\u53d6\u5f97\u60ca\u4eba\u7684\u6210\u7ee9\u3002\u4f46\u662f\uff0cSSD\u6709\u5176\u81ea\u8eab\u7279\u6709\u7684\u5f31\u70b9\uff0c\u6bd4\u5982\u6df7\u5408\u8bfb\u5199\u3001\u5783\u573e\u56de\u6536\u3001ECC\u3001\u78e8\u635f\u5e73\u8861\uff0c\u7b49\u7b49\u3002\u800c\u4e14\u901a\u5e38\u4e00\u4e2a\u65b0SSD\u7a7a\u76d8\u7684\u6027\u80fd\u4f1a\u6bd4\u4f7f\u7528\u4e86\u4e00\u5e74\u4e4b\u540e\u3001\u5305\u542b\u5f88\u591a\u6570\u636e\u7684SSD\u6027\u80fd\u9ad8\u51fa\u8bb8\u591a\u3002\u6240\u4ee5\u9762\u5411\u4f20\u7edfHDD\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u5e76\u4e0d\u9002\u7528\u4e8eSSD\u3002<\/p>\n<p>\u5c3d\u7ba1\u96be\u4ee5\u7b80\u5355\u5bf9\u6bd4\uff0c\u4e0b\u9762\u7684\u8868\u683c\u8fd8\u662f\u5728\u7406\u8bba\u4e0a\u7ed9\u51fa\u4e24\u8005\u7684\u5dee\u5f02\uff1a<\/p>\n<table border=\"1\" width=\"95%\">\n<tbody>\n<tr>\n<td width=\"20%\"><\/td>\n<td width=\"50%\">SSD<\/td>\n<td>HDD<\/td>\n<\/tr>\n<tr>\n<td>\u542f\u52a8\u65f6\u95f4<\/td>\n<td>\u7531\u4e8e\u6ca1\u6709\u9a6c\u8fbe\u548c\u8f6c\u81c2\uff0c\u6240\u4ee5\u51e0\u4e4e\u53ef\u4ee5\u77ac\u95f4\u5b8c\u6210\u3002\u540c\u65f6\u4ece\u4f11\u7720\u6a21\u5f0f\u4e2d\u5524\u9192\u4e5f\u5927\u7ea6\u53ea\u9700\u8981\u51e0\u6beb\u79d2\u5373\u53ef\u3002<\/td>\n<td>\u53ef\u80fd\u9700\u8981\u6570\u79d2\u4ee5\u542f\u52a8\u9a6c\u8fbe\u3002\u800c\u4e14\u5f53\u78c1\u76d8\u91cf\u975e\u5e38\u5927\u7684\u65f6\u5019\uff0c\u9700\u8981\u4f9d\u6b21\u542f\u52a8\u4ee5\u9632\u6b62\u77ac\u95f4\u7535\u6d41\u8fc7\u8f7d\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u968f\u673a\u8bbf\u95ee\u65f6\u95f4<\/td>\n<td>\u5927\u7ea6\u4ec5\u97000.1\u6beb\u79d2\uff0c\u56e0\u4e3a\u65e0\u9700\u5bfb\u9053\u3002<\/td>\n<td>\u5927\u7ea6\u9700\u89815\u201310\u6beb\u79d2\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u8bfb\u53d6\u6f5c\u4f0f\u671f<\/td>\n<td>\u901a\u5e38\u5f88\u77ed\uff0c\u56e0\u4e3a\u76f4\u63a5\u8bfb\u53d6\u3002<\/td>\n<td>\u901a\u5e38\u6bd4\u8f83\u9ad8\uff0c\u56e0\u4e3a\u78c1\u5934\u9700\u8981\u989d\u5916\u7684\u65f6\u95f4\u7b49\u5f85\u6247\u533a\u7684\u5230\u6765\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u8bfb\u53d6\u6027\u80fd\u4e00\u81f4\u6027<\/td>\n<td>\u8bfb\u53d6\u6027\u80fd\u4e0d\u56e0\u6570\u636e\u5728SSD\u4e0a\u7684\u5b58\u50a8\u4f4d\u7f6e\u4e0d\u540c\u800c\u4e0d\u540c\u3002<\/td>\n<td>\u8bfb\u53d6\u6027\u80fd\u4e0e\u5b58\u653e\u5728\u78c1\u76d8\u7684\u5185\u5708\u8fd8\u662f\u5916\u5708\u6709\u5173\uff0c\u4e5f\u4e0e\u6587\u4ef6\u7684\u788e\u7247\u7a0b\u5ea6\u6709\u5173\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u788e\u7247\u6574\u7406<\/td>\n<td>SSD\u57fa\u672c\u4e0d\u9700\u8981\u8fdb\u884c\u788e\u7247\u6574\u7406\uff0c\u56e0\u4e3a\u8bfb\u53d6\u8fde\u7eed\u7684\u6570\u636e\u5e76\u4e0d\u660e\u663e\u6bd4\u8bfb\u53d6\u5206\u6563\u7684\u6570\u636e\u5757\u3002\u5e76\u4e14\u788e\u7247\u6574\u7406\u4f1a\u989d\u5916\u589e\u52a0NAND\u95ea\u5b58\u7684\u5199\u5165\u6b21\u6570\uff0c\u4ece\u800c\u964d\u4f4e\u5176\u5bff\u547d\u3002<\/td>\n<td>HDD\u901a\u5e38\u9700\u8981\u5728\u6587\u4ef6\u788e\u7247\u8fbe\u5230\u4e00\u5b9a\u7a0b\u5ea6\u540e\u8fdb\u884c\u6574\u7406\uff0c\u5426\u5219\u6027\u80fd\u4f1a\u6709\u660e\u663e\u4e0b\u964d\u3002\u7279\u522b\u662f\u5728\u542b\u6709\u5927\u91cf\u6587\u4ef6\u7684\u60c5\u51b5\u4e0b\u66f4\u662f\u5982\u6b64\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u566a\u97f3<\/td>\n<td>SSD\u65e0\u4efb\u4f55\u566a\u97f3<\/td>\n<td>HDD\u6709\u660e\u663e\u7684\u566a\u97f3\uff0c\u5e76\u4e14\u5728\u8bfb\u5199\u9891\u7e41\u7684\u65f6\u5019\u566a\u97f3\u66f4\u5927\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u673a\u68b0\u53ef\u9760\u6027<\/td>\n<td>\u65e0\u673a\u68b0\u6545\u969c<\/td>\n<td>\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u673a\u68b0\u6545\u969c\u6982\u7387\u4f1a\u9010\u6e10\u589e\u52a0\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u73af\u5883\u654f\u611f\u6027<\/td>\n<td>\u5bf9\u9707\u52a8\u3001\u78c1\u573a\u3001\u78b0\u649e\u4e0d\u654f\u611f<\/td>\n<td>\u5bf9\u9707\u52a8\u3001\u78c1\u573a\u3001\u78b0\u649e\u654f\u611f<\/td>\n<\/tr>\n<tr>\n<td>\u4f53\u79ef\u548c\u91cd\u91cf<\/td>\n<td>\u4f53\u79ef\u5c0f\u3001\u91cd\u91cf\u8f7b<\/td>\n<td>\u6027\u80fd\u8d8a\u9ad8\uff0c\u4f53\u79ef\u548c\u91cd\u91cf\u8d8a\u5927<\/td>\n<\/tr>\n<tr>\n<td>\u5e76\u884c\u64cd\u4f5c<\/td>\n<td>\u591a\u6570\u63a7\u5236\u5668\u53ef\u4ee5\u4f7f\u7528\u591a\u4e2a\u82af\u7247\u8fdb\u884c\u5e76\u53d1\u8bfb\u5199<\/td>\n<td>HDD\u867d\u7136\u6709\u591a\u4e2a\u78c1\u5934\uff0c\u4f46\u662f\u7531\u4e8e\u5171\u4eab\u540c\u4e00\u4e2a\u4f4d\u7f6e\u63a7\u5236\u7535\u673a\uff0c\u6240\u4ee5\u4e0d\u80fd\u5e76\u53d1\u8bfb\u5199\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u5199\u5165\u5bff\u547d<\/td>\n<td>\u57fa\u4e8e\u95ea\u5b58\u7684SSD\u6709\u5199\u5165\u5bff\u547d\u9650\u5236\uff0c\u4e14\u4e00\u65e6\u635f\u574f\uff0c\u6574\u4e2aSSD\u7684\u6570\u636e\u90fd\u5c06\u4e22\u5931\u3002<\/td>\n<td>\u65e0\u5199\u5165\u5bff\u547d\u9650\u5236<\/td>\n<\/tr>\n<tr>\n<td>\u6570\u636e\u5b89\u5168\u95ee\u9898<\/td>\n<td>NAND\u95ea\u5b58\u7684\u5b58\u50a8\u5757\u4e0d\u80fd\u88ab\u76f4\u63a5\u8986\u76d6\u91cd\u5199\uff0c\u53ea\u80fd\u91cd\u65b0\u5199\u5165\u5148\u524d\u88ab\u64e6\u9664\u7684\u5757\u4e2d\u3002\u5982\u679c\u4e00\u4e2a\u8f6f\u4ef6\u52a0\u5bc6\u7a0b\u5e8f\u5bf9\u5df2\u7ecf\u5b58\u5728\u4e8eSSD\u4e0a\u7684\u6570\u636e\u8fdb\u884c\u52a0\u5bc6\uff0c\u90a3\u4e9b\u539f\u59cb\u7684\u3001\u770b\u4e0a\u53bb\u5df2\u7ecf\u88ab\u8986\u76d6\u6389\u7684\u539f\u59cb\u6570\u636e\u5b9e\u9645\u4e0a\u5e76\u6ca1\u6709\u88ab\u8986\u76d6\uff0c\u5b83\u4eec\u4f9d\u7136\u53ef\u4ee5\u88ab\u8bfb\u53d6\uff0c\u4ece\u800c\u9020\u6210\u4fe1\u606f\u6cc4\u6f0f\u3002\u4f46\u662fSSD\u81ea\u8eab\u57fa\u4e8e\u786c\u4ef6\u7684\u52a0\u5bc6\u88c5\u7f6e\u6ca1\u6709\u8fd9\u4e2a\u95ee\u9898\u3002\u6b64\u5916\uff0c\u4e5f\u4e0d\u80fd\u7b80\u5355\u7684\u901a\u8fc7\u8986\u76d6\u539f\u6587\u4ef6\u7684\u529e\u6cd5\u6765\u6e05\u9664\u539f\u6709\u7684\u6570\u636e\uff0c\u9664\u975e\u8be5SSD\u6709\u5185\u5efa\u7684\u5b89\u5168\u5220\u9664\u673a\u5236\uff0c\u5e76\u4e14\u786e\u5b9e\u5df2\u7ecf\u88ab\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