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VMware虛擬機(jī)（Linux）中，我們的Linux服務(wù)器可能擁有多個(gè)磁盤（或者叫虛擬磁盤），如下所示，這個(gè)服務(wù)器的磁盤有硬盤1、硬盤2、…………硬盤10總共10塊硬盤。

而Linux系統(tǒng)中，磁盤中對(duì)應(yīng)的設(shè)備如下

[root@mylnx01 ~]# ls -lrt /dev/sd*brw-r----- 1 root disk 8,   0 Apr 30 09:53 /dev/sdabrw-r----- 1 root disk 8,   3 Apr 30 09:53 /dev/sda3brw-r----- 1 root disk 8,   2 Apr 30 09:53 /dev/sda2brw-r----- 1 root disk 8,  21 Apr 30 09:53 /dev/sdb5brw-r----- 1 root disk 8,  18 Apr 30 09:53 /dev/sdb2brw-r----- 1 root disk 8,  17 Apr 30 09:53 /dev/sdb1brw-r----- 1 root disk 8,  16 Apr 30 09:53 /dev/sdbbrw-r----- 1 root disk 8,  37 Apr 30 09:53 /dev/sdc5brw-r----- 1 root disk 8,  34 Apr 30 09:53 /dev/sdc2brw-r----- 1 root disk 8,  33 Apr 30 09:53 /dev/sdc1brw-r----- 1 root disk 8,  32 Apr 30 09:53 /dev/sdcbrw-r----- 1 root disk 8,  64 Apr 30 09:53 /dev/sdebrw-r----- 1 root disk 8,  49 Apr 30 09:53 /dev/sdd1brw-r----- 1 root disk 8,  48 Apr 30 09:53 /dev/sddbrw-r----- 1 root disk 8,  82 Apr 30 09:53 /dev/sdf2brw-r----- 1 root disk 8,  81 Apr 30 09:53 /dev/sdf1brw-r----- 1 root disk 8,  80 Apr 30 09:53 /dev/sdfbrw-r----- 1 root disk 8,  69 Apr 30 09:53 /dev/sde5brw-r----- 1 root disk 8,  65 Apr 30 09:53 /dev/sde1brw-r----- 1 root disk 8, 113 Apr 30 09:53 /dev/sdh1brw-r----- 1 root disk 8, 112 Apr 30 09:53 /dev/sdhbrw-r----- 1 root disk 8,  96 Apr 30 09:53 /dev/sdgbrw-r----- 1 root disk 8,  85 Apr 30 09:53 /dev/sdf5brw-r----- 1 root disk 8, 129 Apr 30 09:53 /dev/sdi1brw-r----- 1 root disk 8, 128 Apr 30 09:53 /dev/sdibrw-r----- 1 root disk 8, 101 Apr 30 09:53 /dev/sdg5brw-r----- 1 root disk 8,  97 Apr 30 09:53 /dev/sdg1brw-r----- 1 root disk 8, 130 Apr 30 09:53 /dev/sdi2brw-r----- 1 root disk 8, 147 Apr 30 09:53 /dev/sdj3brw-r----- 1 root disk 8, 146 Apr 30 09:53 /dev/sdj2brw-r----- 1 root disk 8, 145 Apr 30 09:53 /dev/sdj1brw-r----- 1 root disk 8, 144 Apr 30 09:53 /dev/sdjbrw-r----- 1 root disk 8, 152 Apr 30 09:53 /dev/sdj8brw-r----- 1 root disk 8, 151 Apr 30 09:53 /dev/sdj7brw-r----- 1 root disk 8, 150 Apr 30 09:53 /dev/sdj6brw-r----- 1 root disk 8, 149 Apr 30 09:53 /dev/sdj5brw-r----- 1 root disk 8, 148 Apr 30 09:53 /dev/sdj4brw-r----- 1 root disk 8, 153 Apr 30 09:53 /dev/sdj9brw-r----- 1 root disk 8,   1 Apr 30 09:53 /dev/sda1

那么我們?nèi)绾握页?dev/sdj對(duì)應(yīng)VMware中的哪個(gè)磁盤呢？相信很多同學(xué)可能想通過磁盤大小來判斷，但是呢，這個(gè)通過磁盤大小不好判斷或者判斷不精準(zhǔn)，主要有下面一些因素：

1：兩邊計(jì)算磁盤大小的方式不一樣?？吹降拇疟P大小有點(diǎn)出入。

2：可能存在相同大小的磁盤，此時(shí)你怎么判斷呢？

那么有沒有通過某個(gè)標(biāo)識(shí)來判斷呢？根據(jù)SCSI標(biāo)準(zhǔn)，每個(gè)SCSI磁盤都有一個(gè)WWID，類似于網(wǎng)卡的MAC地址，而且是獨(dú)一無二。Linux系統(tǒng)上/dev/disk/by-id目錄包含每個(gè)SCSI磁盤WWID訪問路徑。

[root@KerryDB ~]# ll /dev/disk/by-id/total 0lrwxrwxrwx. 1 root root  9 Apr 11 09:25 ata-ST500DM002-1BD142_Z6EA17FP -> ../../sdalrwxrwxrwx. 1 root root 10 Apr 11 09:25 ata-ST500DM002-1BD142_Z6EA17FP-part1 -> ../../sda1lrwxrwxrwx. 1 root root 10 Apr 11 09:25 ata-ST500DM002-1BD142_Z6EA17FP-part2 -> ../../sda2lrwxrwxrwx. 1 root root 10 Apr 11 09:25 ata-ST500DM002-1BD142_Z6EA17FP-part3 -> ../../sda3lrwxrwxrwx. 1 root root 10 Mar 10 14:29 dm-name-centos-home -> ../../dm-2lrwxrwxrwx. 1 root root 10 Mar 10 14:29 dm-name-centos-root -> ../../dm-0lrwxrwxrwx. 1 root root 10 Mar 10 14:29 dm-name-centos-swap -> ../../dm-1lrwxrwxrwx. 1 root root 10 Mar 10 14:29 dm-uuid-LVM-OoLL2Ne7hVrlu1rWFZRicmPrEZGxlZhQ2GwVhfhZrdLWmRZ3KuKGNJJqskLn2noy -> ../../dm-0lrwxrwxrwx. 1 root root 10 Mar 10 14:29 dm-uuid-LVM-OoLL2Ne7hVrlu1rWFZRicmPrEZGxlZhQNALIUTdrhqV42RQNW8jaImopDuEPs5b3 -> ../../dm-1lrwxrwxrwx. 1 root root 10 Mar 10 14:29 dm-uuid-LVM-OoLL2Ne7hVrlu1rWFZRicmPrEZGxlZhQybFeXSOtclTjcV0dS9tKiwA1IVBwxnrK -> ../../dm-2lrwxrwxrwx. 1 root root 10 Apr 11 09:25 lvm-pv-uuid-FAYN5y-YdiR-CywU-1vDf-Btz6-dkyt-TNy8ee -> ../../sda3lrwxrwxrwx. 1 root root  9 Apr 11 09:25 wwn-0x5000c5007911cd0c -> ../../sdalrwxrwxrwx. 1 root root 10 Apr 11 09:25 wwn-0x5000c5007911cd0c-part1 -> ../../sda1lrwxrwxrwx. 1 root root 10 Apr 11 09:25 wwn-0x5000c5007911cd0c-part2 -> ../../sda2lrwxrwxrwx. 1 root root 10 Apr 11 09:25 wwn-0x5000c5007911cd0c-part3 -> ../../sda3

但是當(dāng)前環(huán)境下，VMware虛擬機(jī)（Linux）默認(rèn)情況下沒有開啟這個(gè)選項(xiàng)。

# ll /dev/disk/by-idls: /dev/disk/by-id: No such file or directory# cd /dev/disk# ls -lrttotal 0drwxr-xr-x 2 root root  60 May  3 19:35 by-uuiddrwxr-xr-x 2 root root  60 May  3 19:35 by-labeldrwxr-xr-x 2 root root 640 May  3 19:35 by-path

而且在VMware vSphere Client連上VMware控制臺(tái)，你會(huì)發(fā)現(xiàn)這里沒有提供硬盤的WWID信息，即使你在Linux中找到設(shè)備的WWID信息，但是在VMware控制臺(tái)也看不到對(duì)應(yīng)的WWID信息，我們還可以通過計(jì)算機(jī)的SCSI編號(hào)來判斷，SCSI 可適用于許多設(shè)備（包括隨機(jī)存取設(shè)備，比如磁盤和像磁帶這樣的順序存儲(chǔ)設(shè)備），如下截圖所示，磁盤有個(gè)顯示是通過SCSI控制器管理磁盤的，硬盤9對(duì)應(yīng)的為SCSI（0:11）

[root@mylnx01 ~]# ll /dev/disk/by-path | grep '0:11'lrwxrwxrwx 1 root root  9 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0 -> ../../sdjlrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part1 -> ../../sdj1lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part2 -> ../../sdj2lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part3 -> ../../sdj3lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part4 -> ../../sdj4lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part5 -> ../../sdj5lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part6 -> ../../sdj6lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part7 -> ../../sdj7lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part8 -> ../../sdj8lrwxrwxrwx 1 root root 10 Apr 30 09:53 pci-0000:00:10.0-scsi-0:0:11:0-part9 -> ../../sdj9 [root@mylnx01 ~]# ls -l /dev/sdj*brw-r----- 1 root disk 8, 144 Apr 30 09:53 /dev/sdjbrw-r----- 1 root disk 8, 145 Apr 30 09:53 /dev/sdj1brw-r----- 1 root disk 8, 146 Apr 30 09:53 /dev/sdj2brw-r----- 1 root disk 8, 147 Apr 30 09:53 /dev/sdj3brw-r----- 1 root disk 8, 148 Apr 30 09:53 /dev/sdj4brw-r----- 1 root disk 8, 149 Apr 30 09:53 /dev/sdj5brw-r----- 1 root disk 8, 150 Apr 30 09:53 /dev/sdj6brw-r----- 1 root disk 8, 151 Apr 30 09:53 /dev/sdj7brw-r----- 1 root disk 8, 152 Apr 30 09:53 /dev/sdj8brw-r----- 1 root disk 8, 153 Apr 30 09:53 /dev/sdj9

如上所示，我們通過上面命令的輸出信息就可以判斷磁盤9對(duì)應(yīng)Linux下的/dev/sdj這個(gè)設(shè)備。

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