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dd if=\/dev\/zero of=test bs=1M count=1000<\/p>\n

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\u5728\u67d0\u79cd\u573a\u666f\u4e0b\uff0c\u6211\u4eec\u53ea\u60f3\u8ba9\u6587\u4ef6\u7cfb\u7edf\u8ba4\u4e3a\u5b58\u5728\u4e00\u4e2a\u8d85\u5927\u6587\u4ef6\u5728\u6b64\uff0c\u4f46\u662f\u5e76\u4e0d\u5b9e\u9645\u5199\u5165\u786c\u76d8<\/p>\n

\u5219\u53ef\u4ee5
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\u6b64\u65f6\u521b\u5efa\u7684\u6587\u4ef6\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u663e\u793a\u5927\u5c0f\u4e3a100000MB\uff0c\u4f46\u662f\u5e76\u4e0d\u5b9e\u9645\u5360\u7528block\uff0c\u56e0\u6b64\u521b\u5efa\u901f\u5ea6\u4e0e\u5185\u5b58\u901f\u5ea6\u76f8\u5f53<\/p>\n

seek\u7684\u4f5c\u7528\u662f\u8df3\u8fc7\u8f93\u51fa<\/span>\u6587\u4ef6\u4e2d\u6307\u5b9a\u5927\u5c0f\u7684\u90e8\u5206\uff0c\u8fd9\u5c31\u8fbe\u5230\u4e86\u521b\u5efa\u5927\u6587\u4ef6\uff0c\u4f46\u662f\u5e76\u4e0d\u5b9e\u9645\u5199\u5165\u7684\u76ee\u7684<\/p>\n

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