{"id":52166,"date":"2024-12-03T08:16:02","date_gmt":"2024-12-03T00:16:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52166\/"},"modified":"2024-12-03T08:16:02","modified_gmt":"2024-12-03T00:16:02","slug":"linux-raw%e6%98%af%e5%8e%9f%e5%a7%8b%e6%95%b0%e6%8d%ae%e6%a0%bc%e5%bc%8f%e5%90%97","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52166\/","title":{"rendered":"linux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\u5417"},"content":{"rendered":"

<\/b> <\/p>\n

linux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\u5417<\/h1>\n

\u600e\u4e48\u5165\u95e8\u6587\u7ae0\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762\u7c73\u4e91\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300alinux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\u5417\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n<\/p>\n

\n

linux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\uff0c\u5728linux\u4e2d\u8868\u793a\u201c\u88f8\u8bbe\u5907\u201d\uff0c\u4e5f\u53eb\u88f8\u5206\u533a\u3001\u539f\u59cb\u5206\u533a\uff1blinux raw\u662f\u4e00\u79cd\u6ca1\u6709\u7ecf\u8fc7\u683c\u5f0f\u5316\uff0c\u4e0d\u88abUnix\/Linux\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u6765\u8bfb\u53d6\u7684\u7279\u6b8a\u5b57\u7b26\u8bbe\u5907\uff1b\u88f8\u8bbe\u5907\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u5206\u533a\uff0c\u4e5f\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u78c1\u76d8\u3002<\/p>\n<\/blockquote>\n

linux raw\u8bbe\u5907\u8be6\u89e3<\/strong><\/p>\n

\u88f8\u8bbe\u5907\u6982\u8ff0<\/p>\n

\u88f8\u8bbe\u5907\uff1a\u4e5f\u53eb\u88f8\u5206\u533a\uff08\u539f\u59cb\u5206\u533a\uff09\uff0c\u662f\u4e00\u79cd\u6ca1\u6709\u7ecf\u8fc7\u683c\u5f0f\u5316\uff0c\u4e0d\u88abUnix\/Linux\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u6765\u8bfb\u53d6\u7684\u7279\u6b8a\u5b57\u7b26\u8bbe\u5907\u3002\u88f8\u8bbe\u5907\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u5206\u533a\uff0c\u4e5f\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u78c1\u76d8\u3002<\/p>\n

\u5b57\u7b26\u8bbe\u5907\uff1a\u5bf9\u5b57\u7b26\u8bbe\u5907\u7684\u8bfb\u5199\u4e0d\u9700\u8981\u901a\u8fc7OS\u7684buffer\u3002\u5b83\u4e0d\u53ef\u88ab\u6587\u4ef6\u7cfb\u7edfmount\u3002<\/p>\n

\u5757\u8bbe\u5907\uff1a\u5bf9\u5757\u8bbe\u5907\u7684\u8bfb\u5199\u9700\u8981\u901a\u8fc7OS\u7684buffer\uff0c\u5b83\u53ef\u4ee5\u88abmount\u5230\u6587\u4ef6\u7cfb\u7edf\u4e2d\u3002<\/p>\n

\u8fd9\u4e2a\u4e0elinux\u7684\u7248\u672c\u76f8\u5173\uff0c\u5728\u65e7\u7248\u672c\u4e2d\uff0c\u6700\u591a\u53ea\u53ef\u4ee5\u6709256\u4e2a\u88f8\u8bbe\u5907\uff0cLinux 4\u4e0b\u505a\u591a\u53ef\u4ee5\u7ed1\u5b9a81Array2\u4e2a\u88f8\u8bbe\u5907\u3002\u4f46\u662f\u5728linux\u4e0b\uff0c\u6700\u591a\u53ea\u80fd\u6709255\u4e2a\u5206\u533a\uff0c\u6240\u4ee5\uff0c\u5982\u679c\u7528\u88f8\u8bbe\u5907\u7ed1\u5b9a\u5206\u533a\uff0c\u6700\u591a\u53ea\u80fd\u7ed1\u5b9a255\u4e2a\u88f8\u8bbe\u5907\u3002\u5982\u679c\u662f\u7528lvm\uff0c\u5219\u6ca1\u6709\u8fd9\u4e2a\u9650\u5236\u3002<\/p>\n

Linux\u4e0b\u5355\u4e2a\u78c1\u76d8\u6700\u591a\u53ef\u4ee5\u670915\u4e2a\u5206\u533a\u30023\u4e2a\u4e3b\u5206\u533a + 1\u4e2a\u6269\u5c55\u5206\u533a + 11\u4e2a\u903b\u8f91\u5206\u533a\u3002<\/p>\n

\u5efa\u8bae\u7684\u5206\u533a\u65b9\u6cd5\u662f\uff1a\u5148\u52063\u4e2a\u4e3b\u5206\u533a\uff0c\u7b2c\u56db\u4e2a\u5206\u533a\u4e3a\u6269\u5c55\u5206\u533a\uff0c\u7136\u540e\u5728\u6269\u5c55\u5206\u533a\u4e2d\u518d\u5206\u621011\u4e2a\u903b\u8f91\u5206\u533a\u3002<\/p>\n

\u6ce8\u610f\uff0c\u88f8\u8bbe\u5907\u4e0d\u8981\u7ed1\u5b9a\u5728\u6269\u5c55\u5206\u533a\u4e0a\u3002<\/p>\n

linux\u4e0b\u5982\u679c\u9700\u8981\u4f7f\u7528\u88f8\u8bbe\u5907\uff0c\u5219\u9700\u8981\u624b\u5de5\u8fdb\u884c\u7ed1\u5b9a\uff0cunix\u4e0b\u5219\u4e0d\u7528\u3002<\/p>\n

\u56e0\u4e3aUnix\u4e2d\u6bcf\u4e00\u4e2a\u5757\u8bbe\u5907\u90fd\u4f1a\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u5b57\u7b26\u8bbe\u5907\u7528\u4e8e\u975e\u7f13\u5b58(unbuffered)I\/O,\u8fd9\u5c31\u662f\u4ed6\u5bf9\u5e94\u7684\u88f8\u8bbe\u5907\u4e86\u3002\u800cLinux\u4e2drawio\u7684\u5219\u5b9e\u73b0\u4e86\u4e00\u5957\u975e\u7ed1\u5b9a(unbound)\u7684\u88f8\u8bbe\u5907\/dev\/rawN\u6216\u8005\/dev\/raw\/rawN\u548c\u4e00\u4e2a\u63a7\u5236\u8bbe\u5907\/dev\/rawct\u7528\u6765\u628a\u4ed6\u4eec\u7ed1\u5b9a\u5230\u5757\u8bbe\u5907\u4e0a\u3002\u6240\u4ee5\u5f53\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u88f8\u8bbe\u5907\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u628a\u4ed6\u548c\u4e00\u4e2a\u771f\u5b9e\u5b58\u5728\u7684\u5757\u8bbe\u5907\u5bf9\u5e94\u8d77\u6765\uff0c\u8fd9\u4e00\u4e2a\u6b65\u9aa4\u5b9e\u9645\u4e0a\u5c31\u662f\u5b8c\u6210\u4e86Unix\u91cc\u7684\u81ea\u52a8\u5bf9\u5e94\u4e00\u4e2a\u975e\u7f13\u5b58\u5b57\u7b26\u8bbe\u5907\u3002<\/p>\n

major\u548cminor device number<\/p>\n

\u5728unix\/linux\u7cfb\u7edf\u4e2d\uff0c\u4e00\u5207\u90fd\u662f\u6587\u4ef6\u3002\u6240\u6709\u786c\u76d8\u3001\u8f6f\u76d8\u3001\u952e\u76d8\u7b49\u8bbe\u5907\u90fd\u7528\u6587\u4ef6\u6765\u4ee3\u8868\uff0c\u5bf9\u5e94\u7740\/dev\u4e0b\u9762\u7684\u6587\u4ef6\u3002\u5bf9\u4e8e\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u53ef\u4ee5\u50cf\u5bf9\u5f85\u666e\u901a\u6587\u4ef6\u4e00\u6837\u6253\u5f00\uff0c\u5173\u95ed\u3001\u8bfb\u5199\u8fd9\u4e9b\u8bbe\u5907\u6587\u4ef6\u3002\u4f46\u662f\u8fd9\u79cd\u6587\u4ef6\u540d\uff0c\u6bd4\u5982\/dev\/sda\u3001\/dev\/raw\/raw1\u90fd\u662f\u7528\u6237\u7a7a\u95f4\u540d\u79f0\uff0cOS Kernel\u6839\u672c\u4e0d\u77e5\u9053\u8fd9\u4e2a\u540d\u79f0\u6307\u7684\u662f\u4ec0\u4e48\u3002\u5728\u5185\u6838\u7a7a\u95f4\u662f\u901a\u8fc7major\u3001minor device number \u6765\u533a\u5206\u8bbe\u5907\u7684\u3002<\/p>\n

major device number\u53ef\u4ee5\u770b\u4f5c\u662f\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\uff0c\u88ab\u540c\u4e00\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u7ba1\u7406\u7684\u8bbe\u5907\u6709\u76f8\u540c\u7684major device number.\u8fd9\u4e2a\u6570\u5b57\u5b9e\u9645\u662fKernel\u4e2ddevice driver table \u7684\u7d22\u5f15\uff0c\u8fd9\u4e2a\u8868\u4fdd\u5b58\u7740\u4e0d\u540c\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u3002\u800cminor device number\u7528\u6765\u4ee3\u8868\u88ab\u8bbf\u95ee\u7684\u5177\u4f53\u8bbe\u5907\u3002\u4e5f\u5c31\u662f\u8bf4Kernel\u6839\u636emajor device number \u627e\u5230\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\uff0c\u7136\u540e\u518d\u4eceminor device number \u83b7\u5f97\u8bbe\u5907\u4f4d\u7f6e\u7b49\u5c5e\u6027\u3002\u6240\u6709\u8fd9\u4e9bmajor device number \u662f\u5df2\u7ecf\u9884\u5148\u5206\u914d\u597d\u7684\u3002\u8be6\u7ec6\u4fe1\u606f\u53ef\u4ee5\u4ecehttp:\/\/www.lanana.org\/docs\/device-list\/devices-2.6+.txt\u67e5\u770b\u3002<\/p>\n

\u6bd4\u5982\u88f8\u8bbe\u5907\u662f162\uff0cscsi\u5757\u8bbe\u5907\u662f8<\/p>\n

\/etc\/udev\/rules.d\/60-raw.rules<\/pre>\n
Redhat\u5e73\u53f0\u5bf9raw\u8bbe\u5907\u7684\u914d\u7f6e\u5728redhat 5\u4e4b\u540e\u6709\u4e86\u53d8\u5316\u3002\u5728redhat 5\u4e4b\u524d\uff0c\u76f4\u63a5\u914d\u7f6e\/etc\/sysconfig\/rawdevices\u4ef6\uff0c\u901a\u8fc7\/etc\/init.d\/rawdevices\u6765\u7ba1\u7406raw\u8bbe\u5907\u7684\u542f\u52a8\u548c\u5173\u95ed\u3002\u5728Redhat 5\u4e4b\u540e\uff0c\u539f\u6765\u7684raw\u8bbe\u5907\u63a5\u53e3\u5df2\u7ecf\u53d6\u6d88\u4e86\uff0credhat 5\u4e2d\u901a\u8fc7udev\u89c4\u5219\u8fdb\u884c\u914d\u7f6e\u3002 \u8981\u914d\u7f6e\uff0c\u9700\u8981\u7f16\u8f91\/etc\/udev\/rules.d\/60-raw.rules\u8fd9\u4e2a\u6587\u4ef6\u3002<\/p>\n
cat \/etc\/udev\/rules.d\/60-raw.rules\n# Enter raw device bindings here.\n#\n# An example would be:\n#   ACTION==\"add\", KERNEL==\"sda\", RUN+=\"\/bin\/raw \/dev\/raw\/raw1 %N\"\n# to bind \/dev\/raw\/raw1 to \/dev\/sda, or\n#   ACTION==\"add\", ENV{MAJOR}==\"8\", ENV{MINOR}==\"1\", RUN+=\"\/bin\/raw \/dev\/raw\/raw2 %M %m\"\n# to bind \/dev\/raw\/raw2 to the device with major 8, minor 1.<\/pre>\n
\u5176\u4e2d<\/p>\n
ACTION==\"add\", KERNEL=\"<device name>\", RUN+=\"raw \/dev\/raw\/rawX %N\"<\/pre>\n
\u914d\u7f6e\u8bbe\u5907\u540d\u79f0\uff0c\u7528\u4f60\u9700\u8981\u7ed1\u5b9a\u7684\u8bbe\u5907\u540d\u79f0\u66ff\u6362 <device name>\uff08\u5982\uff1a\/dev\/sda1\uff09\uff0cX\u4e3a\u88f8\u8bbe\u5907\u53f7<\/p>\n
\u4e3b\/\u6b21\u53f7\u7801\uff1a<\/p>\n
ACTION==\"add\", ENV{MAJOR}=\"A\", ENV{MINOR}=\"B\", RUN+=\"raw \/dev\/raw\/rawX %M %m\"<\/pre>\n
“A” \u548c “B” \u662f\u8bbe\u5907\u7684\u4e3b\/\u6b21\u53f7\u7801\uff0cX\u662f\u7cfb\u7edf\u4f7f\u7528\u7684raw\u8bbe\u5907\u53f7\u7801\u3002<\/p>\n
\u4e2a\u4eba\u5bf9redhat\u7ba1\u7406raw\u7684\u8fc7\u7a0b\u7406\u89e3\u4e3a\uff1a\u5728redhat 5\u4e2d\uff0c\u662f\u901a\u8fc7udev\u6765\u7ba1\u7406raw\u8bbe\u5907\u7684\uff0c\u800cudev\u662f\u901a\u8fc7MAJOR\u548cMINOR\u6765\u8bc6\u522braw\u8bbe\u5907\u3002\u6545\u9700\u8981\u5c06\u8bbe\u5907\u53f7\u548c\u88f8\u8bbe\u5907\u53f7\u8fdb\u884c\u7ed1\u5b9a\uff0c\u800c\u4e3b\u8bbe\u5907\u53f7\u548c\u6b21\u8bbe\u5907\u53f7\u53ef\u4ee5\u81ea\u884c\u6307\u5b9a\u6216\u8005\u7531\u7cfb\u7edf\u81ea\u52a8\u5206\u914d\u3002\u6839\u636ered hat\u7684\u5b98\u65b9\u6587\u6863\u4e2d\u5173\u4e8eraw.rule\u7684\u793a\u4f8b\u4e2d\u8bf4KERNEL==..\u6216ENV{MAJOR}…\u53ea\u9700\u8981\u4efb\u610f\u914d\u7f6e\u4e00\u4e2a\u5c31\u53ef\u4ee5\uff0c\u4f46\u6709\u4e9b\u7f51\u53cb\u7ecf\u8fc7\u8bd5\u9a8c\uff0c\u9a8c\u8bc1\u5fc5\u987b\u4e8c\u8005\u540c\u65f6\u914d\u7f6e\u624d\u53ef\u4ee5\u3002<\/p>\n
\u914d\u7f6e\/etc\/udev\/rules.d\/60-raw.rules\u6587\u4ef6<\/p>\n
\u67e5\u770b\u78c1\u76d8\u5206\u533a\u60c5\u51b5<\/p>\n
# fdisk  -l \/dev\/sdb\nDisk \/dev\/sdb: 4880 MB, 4880072704 bytes\n255 heads, 63 sectors\/track, 593 cylinders\nUnits = cylinders of 16065 * 512 = 8225280 bytes\n   Device Boot      Start         End      Blocks   Id  System\n\/dev\/sdb1               1          25      200781   83  Linux\n\/dev\/sdb2              26          50      200812+  83  Linux<\/pre>\n
\u914d\u7f6e\/etc\/udev\/rules.d\/60-raw.rules\u6587\u4ef6<\/p>\n
# grep -v ^# \/etc\/udev\/rules.d\/60-raw.rules\nACTION==\"add\", KERNEL==\"sdb1\", RUN+=\"\/bin\/raw \/dev\/raw\/raw1 %N\"\nACTION==\"add\", KERNEL==\"sdb2\", RUN+=\"\/bin\/raw \/dev\/raw\/raw2 %N\"\nACTION==\"add\", ENV{MAJOR}==\"3\", ENV{MINOR}==\"2\", RUN+=\"\/bin\/raw \/dev\/raw\/raw1 %M %m\"\nACTION==\"add\", ENV{MAJOR}==\"7\", ENV{MINOR}==\"2\", RUN+=\"\/bin\/raw \/dev\/raw\/raw2 %M %m\"<\/pre>\n
\u542f\u52a8raw\u8bbe\u5907<\/p>\n
# start_udev\nStarting udev:                                             [  OK  ]<\/pre>\n
\u67e5\u770b\u914d\u7f6e\u60c5\u51b5<\/p>\n
# raw -qa\n\/dev\/raw\/raw1:  bound to major 8, minor 17\n\/dev\/raw\/raw2:  bound to major 8, minor 18<\/pre>\n
\u8fd9\u91cc\u7b14\u8005\u4e0d\u6e05\u695a\u4e3a\u4ec0\u4e48\u4e3b\u8bbe\u5907\u53f7\u548c\u590d\u8bbe\u5907\u53f7\u5e76\u4e0d\u548c\u6211\u5728\/etc\/udev\/rules.d\/60-raw.rules\u6307\u5b9a\u7684\u4e00\u6837\uff0c\u671b\u4e86\u89e3\u7684\u8bfb\u8005\u544a\u77e5\uff0c\u7cfb\u7edf\u5185\u6838\u4fe1\u606f\u5982\u4e0b<\/p>\n
# uname  -a\nLinux rac1 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU\/Linux\n# cat \/etc\/redhat-release\nRed Hat Enterprise Linux Server release 5.4 (Tikanga)<\/pre>\n
\u53ef\u4ee5\u901a\u8fc7\u5982\u4e0b\u65b9\u5f0f\u6307\u5b9a\u4e3b\u8bbe\u5907\u53f7\u548c\u590d\u8bbe\u5907\u53f7<\/p>\n
# raw \/dev\/raw\/raw1 1 1\n\/dev\/raw\/raw1:  bound to major 1, minor 1\nraw \/dev\/raw\/raw[n] \/dev\/xxx<\/pre>\n
\u5176\u4e2dn\u7684\u8303\u56f4\u662f0-8191\u3002raw\u76ee\u5f55\u4e0d\u5b58\u5728\u7684\u8bdd\u4f1a\u88ab\u81ea\u52a8\u521b\u5efa\u3002\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\uff0c\u5c31\u4f1a\u5728\/dev\/raw\u4e0b\u751f\u6210\u4e00\u4e2a\u5bf9\u5e94\u7684raw[n]\u6587\u4ef6\u7528\u547d\u4ee4\u65b9\u5f0f\u7ed1\u5b9a\u88f8\u8bbe\u5907\u5728\u7cfb\u7edf\u91cd\u542f\u540e\u4f1a\u5931\u6548\u3002<\/p>\n
\u5220\u9664\u88f8\u8bbe\u5907<\/p>\n
# raw \/dev\/raw\/raw2 0 0\n\/dev\/raw\/raw2:  bound to major 0, minor 0\n# raw -qa\n\/dev\/raw\/raw1:  bound to major 1, minor 1<\/pre>\n
\u4ee5\u4e0a\u8bbe\u7f6e\u5fc5\u987b\u540c\u65f6\u4fee\u6539\/etc\/udev\/rules.d\/60-raw.rules\u624d\u80fd\u4fdd\u8bc1\u91cd\u542f\u540e\u751f\u6548\uff0c\u5426\u5219\u91cd\u542f\u540e\u7cfb\u7edf\u4f1a\u91cd\u65b0\u8bfb\u53d6\/etc\/udev\/rules.d\/60-raw.rules<\/p>\n
\u5982\u9700\u8bbe\u7f6eraw\u8bbe\u5907\u7684\u7528\u6237\u548c\u6743\u9650\u4fe1\u606f\uff0c\u53ef\u5728\/etc\/udev\/rules.d\/60-raw.rules\u6587\u4ef6\u91cc\u6dfb\u52a0\u5982\u4e0b\u4fe1\u606f\uff1a<\/p>\n
ACTION==\"add\", KERNEL==\"raw1\", OWNER=\"dave\", GROUP=\"tianlesoftware\", MODE=\"660\"<\/pre>\n
\u5982\u679c\u6709\u591a\u4e2araw\u8bbe\u5907\uff0c\u53ef\u4ee5\u5199\u6210\uff1a<\/p>\n
ACTION==\"add\", KERNEL==\"raw[1-4]\", OWNER=\"dave\", GROUP=\"tianlesoftware\", MODE=\"660\"\n#chown oracle:oinstall \/dev\/raw\/raw[1-4]\n#chmod 775 \/dev\/raw\/raw[1-4]<\/pre>\n
\u6ce8\u610f\uff1a\u5728\u5185\u68382.6.9-89.5AXS2\u4e4b\u524d\u4f7f\u7528\/etc\/sysconfig\/rawdevices\u548c\/etc\/udev\/permissions.d\/50-udev.permissions\u8fdb\u884craw\u8bbe\u5907\u7684\u914d\u7f6e\u548c\u6743\u9650\u7ba1\u7406\u3002\u5728\u5185\u6838 2.6.18-128.7AXS3\u4ee5\u540e\u5219\u4f7f\u7528\u4e86\u672c\u6587\u4ecb\u7ecd\u7684\/etc\/udev\/rules.d\/60-raw.rules\u8fdb\u884craw\u8bbe\u5907\u7684\u7ba1\u7406<\/p>\n
\u786e\u5b9a\u88f8\u8bbe\u5907\u7684\u5927\u5c0f<\/p>\n
\u6bd4\u8f83\u7b28\u7684\u529e\u6cd5\u662f\uff0c\u627e\u51fa\u770b\u88f8\u8bbe\u5907\u5bf9\u5e94\u7684\u662f\u90a3\u4e2a\u5b9e\u9645\u7684\u5757\u8bbe\u5907\uff0c\u7136\u540e\u7528fdisk -l \/dev\/[h,s]dXN\u770b\u90a3\u4e2a\u5757\u8bbe\u5907\u7684\u5927\u5c0f\u5c31\u597d\u4e86\u3002\u6bd4\u8f83\u7b80\u5355\u7684\u529e\u6cd5\u662f\u7528blockdev\u547d\u4ee4\u6765\u8ba1\u7b97\uff0c\u5982\uff1a<\/p>\n
#blockdev –getsize \/dev\/raw\/raw1<\/p>\n
11718750<\/p>\n
11718750\u8868\u793a\u6709\u591a\u5c11OS BLIOCK\u3002<\/p>\n
\u4e00\u822c\u4e00\u4e2aOS BLOCK\u5927\u5c0f\u662f512\u5b57\u8282\uff0c\u6240\u4ee511718750*512\/1024\/1024= 5722(m) \u5c31\u662f\u88f8\u8bbe\u5907\u7684\u5927\u5c0f\u3002<\/p>\n
\u4f7f\u7528\u88f8\u8bbe\u5907\u4f5c\u4e3aoracle\u7684\u6570\u636e\u6587\u4ef6\u7684\u6ce8\u610f\u4e8b\u9879<\/p>\n
1\u3001\u4e00\u4e2a\u88f8\u8bbe\u5907\u53ea\u80fd\u653e\u7f6e\u4e00\u4e2a\u6570\u636e\u6587\u4ef6<\/p>\n
2\u3001\u6570\u636e\u6587\u4ef6\u7684\u5927\u5c0f\u4e0d\u80fd\u8d85\u8fc7\u88f8\u8bbe\u5907\u7684\u5927\u5c0f<\/p>\n
\u5982\u679c\u662f\u65e5\u5fd7\u6587\u4ef6\uff0c\u5219\u88f8\u8bbe\u5907\u6700\u5927\u53ef\u7528\u5927\u5c0f=\u88f8\u8bbe\u5907\u5bf9\u5e94\u5206\u533a\u5927\u5c0f – 1 * 512 \uff08\u4fdd\u7559\u4e00\u4e2aredo lock\uff09<\/p>\n
\u5982\u679c\u662f\u6570\u636e\u6587\u4ef6\uff0c\u5219\u88f8\u8bbe\u5907\u6700\u5927\u53ef\u7528\u5927\u5c0f=\u88f8\u8bbe\u5907\u5bf9\u5e94\u5206\u533a\u5927\u5c0f – 2 * db_block_size\uff08\u4fdd\u7559\u4e24\u4e2ablock\uff09<\/p>\n
\u4e3a\u4e86\u7b80\u5355\u8d77\u89c1\uff0c\u5bf9\u6240\u6709\u7684\u6587\u4ef6\u8bbe\u7f6e\u79f0\u6bd4\u88f8\u8bbe\u5907\u5c0f1M\u5373\u53ef\u3002<\/p>\n
3\u3001\u6570\u636e\u6587\u4ef6\u6700\u597d\u4e0d\u8981\u8bbe\u7f6e\u79f0\u81ea\u52a8\u6269\u5c55\uff0c\u5982\u679c\u8bbe\u7f6e\u79f0\u81ea\u52a8\u6269\u5c55\uff0c\u4e00\u5b9a\u8981\u628amaxsize\u8bbe\u7f6e\u8bbe\u7f6e\u4e3a\u6bd4\u88f8\u8bbe\u5907\u5c0f<\/p>\n
4\u3001linux\u4e0boracle\u4e0d\u80fd\u76f4\u63a5\u628a\u903b\u8f91\u5377\u4f5c\u4e3a\u88f8\u8bbe\u5907\uff0c\u4e5f\u8981\u8fdb\u884c\u7ed1\u5b9a\u3002unix\u4e0b\u5c31\u4e0d\u9700\u8981\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300alinux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\u5417\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eLinux,raw\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
linux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\u5417 \u600e\u4e48\u5165\u95e8\u6587\u7ae0\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762\u7c73\u4e91\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300alinux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\u5417\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b linux raw\u662f\u539f\u59cb\u6570\u636e\u683c\u5f0f\uff0c\u5728linux\u4e2d\u8868\u793a\u201c\u88f8\u8bbe\u5907\u201d\uff0c\u4e5f\u53eb\u88f8\u5206\u533a\u3001\u539f\u59cb\u5206\u533a\uff1blinux raw\u662f\u4e00\u79cd\u6ca1\u6709\u7ecf\u8fc7\u683c\u5f0f\u5316\uff0c\u4e0d\u88abUnix\/Linux\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u6765\u8bfb\u53d6\u7684\u7279\u6b8a\u5b57\u7b26\u8bbe\u5907\uff1b\u88f8\u8bbe\u5907\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u5206\u533a\uff0c\u4e5f\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u78c1\u76d8\u3002 linux raw\u8bbe\u5907\u8be6\u89e3 \u88f8\u8bbe\u5907\u6982\u8ff0 \u88f8\u8bbe\u5907\uff1a\u4e5f\u53eb\u88f8\u5206\u533a\uff08\u539f\u59cb\u5206\u533a\uff09\uff0c\u662f\u4e00\u79cd\u6ca1\u6709\u7ecf\u8fc7\u683c\u5f0f\u5316\uff0c\u4e0d\u88abUnix\/Linux\u901a\u8fc7\u6587\u4ef6\u7cfb\u7edf\u6765\u8bfb\u53d6\u7684\u7279\u6b8a\u5b57\u7b26\u8bbe\u5907\u3002\u88f8\u8bbe\u5907\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u5206\u533a\uff0c\u4e5f\u53ef\u4ee5\u7ed1\u5b9a\u4e00\u4e2a\u78c1\u76d8\u3002 \u5b57\u7b26\u8bbe\u5907\uff1a\u5bf9\u5b57\u7b26\u8bbe\u5907\u7684\u8bfb\u5199\u4e0d\u9700\u8981\u901a\u8fc7OS\u7684buffer\u3002\u5b83\u4e0d\u53ef\u88ab\u6587\u4ef6\u7cfb\u7edfmount\u3002 \u5757\u8bbe\u5907\uff1a\u5bf9\u5757\u8bbe\u5907\u7684\u8bfb\u5199\u9700\u8981\u901a\u8fc7OS\u7684buffer\uff0c\u5b83\u53ef\u4ee5\u88abmount\u5230\u6587\u4ef6\u7cfb\u7edf\u4e2d\u3002 \u8fd9\u4e2a\u4e0elinux\u7684\u7248\u672c\u76f8\u5173\uff0c\u5728\u65e7\u7248\u672c\u4e2d\uff0c\u6700\u591a\u53ea\u53ef\u4ee5\u6709256\u4e2a\u88f8\u8bbe\u5907\uff0cLinux 4\u4e0b\u505a\u591a\u53ef\u4ee5\u7ed1\u5b9a81Array2\u4e2a\u88f8\u8bbe\u5907\u3002\u4f46\u662f\u5728linux\u4e0b\uff0c\u6700\u591a\u53ea\u80fd\u6709255\u4e2a\u5206\u533a\uff0c\u6240\u4ee5\uff0c\u5982\u679c\u7528\u88f8\u8bbe\u5907\u7ed1\u5b9a\u5206\u533a\uff0c\u6700\u591a\u53ea\u80fd\u7ed1\u5b9a255\u4e2a\u88f8\u8bbe\u5907\u3002\u5982\u679c\u662f\u7528lvm\uff0c\u5219\u6ca1\u6709\u8fd9\u4e2a\u9650\u5236\u3002 Linux\u4e0b\u5355\u4e2a\u78c1\u76d8\u6700\u591a\u53ef\u4ee5\u670915\u4e2a\u5206\u533a\u30023\u4e2a\u4e3b\u5206\u533a + 1\u4e2a\u6269\u5c55\u5206\u533a + 11\u4e2a\u903b\u8f91\u5206\u533a\u3002 \u5efa\u8bae\u7684\u5206\u533a\u65b9\u6cd5\u662f\uff1a\u5148\u52063\u4e2a\u4e3b\u5206\u533a\uff0c\u7b2c\u56db\u4e2a\u5206\u533a\u4e3a\u6269\u5c55\u5206\u533a\uff0c\u7136\u540e\u5728\u6269\u5c55\u5206\u533a\u4e2d\u518d\u5206\u621011\u4e2a\u903b\u8f91\u5206\u533a\u3002 \u6ce8\u610f\uff0c\u88f8\u8bbe\u5907\u4e0d\u8981\u7ed1\u5b9a\u5728\u6269\u5c55\u5206\u533a\u4e0a\u3002 linux\u4e0b\u5982\u679c\u9700\u8981\u4f7f\u7528\u88f8\u8bbe\u5907\uff0c\u5219\u9700\u8981\u624b\u5de5\u8fdb\u884c\u7ed1\u5b9a\uff0cunix\u4e0b\u5219\u4e0d\u7528\u3002 \u56e0\u4e3aUnix\u4e2d\u6bcf\u4e00\u4e2a\u5757\u8bbe\u5907\u90fd\u4f1a\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u5b57\u7b26\u8bbe\u5907\u7528\u4e8e\u975e\u7f13\u5b58(unbuffered)I\/O,\u8fd9\u5c31\u662f\u4ed6\u5bf9\u5e94\u7684\u88f8\u8bbe\u5907\u4e86\u3002\u800cLinux\u4e2drawio\u7684\u5219\u5b9e\u73b0\u4e86\u4e00\u5957\u975e\u7ed1\u5b9a(unbound)\u7684\u88f8\u8bbe\u5907\/dev\/rawN\u6216\u8005\/dev\/raw\/rawN\u548c\u4e00\u4e2a\u63a7\u5236\u8bbe\u5907\/dev\/rawct\u7528\u6765\u628a\u4ed6\u4eec\u7ed1\u5b9a\u5230\u5757\u8bbe\u5907\u4e0a\u3002\u6240\u4ee5\u5f53\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u88f8\u8bbe\u5907\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u628a\u4ed6\u548c\u4e00\u4e2a\u771f\u5b9e\u5b58\u5728\u7684\u5757\u8bbe\u5907\u5bf9\u5e94\u8d77\u6765\uff0c\u8fd9\u4e00\u4e2a\u6b65\u9aa4\u5b9e\u9645\u4e0a\u5c31\u662f\u5b8c\u6210\u4e86Unix\u91cc\u7684\u81ea\u52a8\u5bf9\u5e94\u4e00\u4e2a\u975e\u7f13\u5b58\u5b57\u7b26\u8bbe\u5907\u3002 major\u548cminor device number \u5728unix\/linux\u7cfb\u7edf\u4e2d\uff0c\u4e00\u5207\u90fd\u662f\u6587\u4ef6\u3002\u6240\u6709\u786c\u76d8\u3001\u8f6f\u76d8\u3001\u952e\u76d8\u7b49\u8bbe\u5907\u90fd\u7528\u6587\u4ef6\u6765\u4ee3\u8868\uff0c\u5bf9\u5e94\u7740\/dev\u4e0b\u9762\u7684\u6587\u4ef6\u3002\u5bf9\u4e8e\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u53ef\u4ee5\u50cf\u5bf9\u5f85\u666e\u901a\u6587\u4ef6\u4e00\u6837\u6253\u5f00\uff0c\u5173\u95ed\u3001\u8bfb\u5199\u8fd9\u4e9b\u8bbe\u5907\u6587\u4ef6\u3002\u4f46\u662f\u8fd9\u79cd\u6587\u4ef6\u540d\uff0c\u6bd4\u5982\/dev\/sda\u3001\/dev\/raw\/raw1\u90fd\u662f\u7528\u6237\u7a7a\u95f4\u540d\u79f0\uff0cOS Kernel\u6839\u672c\u4e0d\u77e5\u9053\u8fd9\u4e2a\u540d\u79f0\u6307\u7684\u662f\u4ec0\u4e48\u3002\u5728\u5185\u6838\u7a7a\u95f4\u662f\u901a\u8fc7major\u3001minor device number \u6765\u533a\u5206\u8bbe\u5907\u7684\u3002 major device number\u53ef\u4ee5\u770b\u4f5c\u662f\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\uff0c\u88ab\u540c\u4e00\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u7ba1\u7406\u7684\u8bbe\u5907\u6709\u76f8\u540c\u7684major device number.\u8fd9\u4e2a\u6570\u5b57\u5b9e\u9645\u662fKernel\u4e2ddevice driver table \u7684\u7d22\u5f15\uff0c\u8fd9\u4e2a\u8868\u4fdd\u5b58\u7740\u4e0d\u540c\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u3002\u800cminor device number\u7528\u6765\u4ee3\u8868\u88ab\u8bbf\u95ee\u7684\u5177\u4f53\u8bbe\u5907\u3002\u4e5f\u5c31\u662f\u8bf4Kernel\u6839\u636emajor device number \u627e\u5230\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\uff0c\u7136\u540e\u518d\u4eceminor device number \u83b7\u5f97\u8bbe\u5907\u4f4d\u7f6e\u7b49\u5c5e\u6027\u3002\u6240\u6709\u8fd9\u4e9bmajor device number \u662f\u5df2\u7ecf\u9884\u5148\u5206\u914d\u597d\u7684\u3002\u8be6\u7ec6\u4fe1\u606f\u53ef\u4ee5\u4ecehttp:\/\/www.lanana.org\/docs\/device-list\/devices-2.6+.txt\u67e5\u770b\u3002 \u6bd4\u5982\u88f8\u8bbe\u5907\u662f162\uff0cscsi\u5757\u8bbe\u5907\u662f8 \/etc\/udev\/rules.d\/60-raw.rules Redhat\u5e73\u53f0\u5bf9raw\u8bbe\u5907\u7684\u914d\u7f6e\u5728redhat 5\u4e4b\u540e\u6709\u4e86\u53d8\u5316\u3002\u5728redhat […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-52166","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=52166"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52166\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=52166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=52166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=52166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}