Linux下挂载LVM碰到卷组同名的办理办法[Linux安全]

 blog:blog.vfocus.net

周末朋友的服务器硬盘出问题了,让IDC的人挂了个IDE硬盘把系统安装好,然后再挂上从前的SATA硬盘,想把数据倒腾出来,后果哥们发现他搞不定,给我打电话告急.我远程上去看了下,发现2块盘系统做的都是LVM分区格局8e,不是ext3的83,难怪他不会挂载,并且还有个问题就是卷组都是默许安装的同一个名字VolGroup00.

[root@locallhost ~]# pvs
  PV         VG         Fmt  Attr PSize   PFree
  /dev/hda2  VolGroup00 lvm2 a-    74.41G    0
  /dev/sda2  VolGroup00 lvm2 a-   232.78G    0

hda2是新系统盘74G多,sda2是老数据盘232G多.卷组名称一样,因为2个系统安装的时刻都是默许安装的.

[root@locallhost ~]# vgs
  VG         #PV #LV #SN Attr   VSize   VFree
  VolGroup00   1   2   0 wz--n- 232.78G    0
  VolGroup00   1   2   0 wz--n-  74.41G    0

我们先用vgrename改卷组名:

[root@locallhost ~]# vgrename VolGroup00 aaalvm
  Found more than one VG called VolGroup00. Please supply VG uuid.

直接报有同名,需求用uuid.查uuid可以用vgdisplay或vgs -v:

[root@locallhost ~]# vgdisplay
  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               232.78 GB
  PE Size               32.00 MB
  Total PE              7449
  Alloc PE / Size       7449 / 232.78 GB
  Free  PE / Size       0 / 0
  VG UUID               bAydq6-rv9e-wCa0-iK2f-zFWn-UBUr-4AR3Ct

  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               74.41 GB
  PE Size               32.00 MB
  Total PE              2381
  Alloc PE / Size       2381 / 74.41 GB
  Free  PE / Size       0 / 0
  VG UUID               YHLmkq-b1xS-UzAS-Y3nv-6vaX-2Xou-GScvk0

[root@locallhost ~]# vgs -v
    Finding all volume groups
    Finding volume group "VolGroup00"
    Archiving volume group "VolGroup00" metadata (seqno 3).
    Archiving volume group "VolGroup00" metadata (seqno 3).
    Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 3).
    Finding volume group "VolGroup00"
    Archiving volume group "VolGroup00" metadata (seqno 3).
    Archiving volume group "VolGroup00" metadata (seqno 3).
    Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 3).
  VG         Attr   Ext    #PV #LV #SN VSize   VFree VG UUID
  VolGroup00 wz--n- 32.00M   1   2   0 232.78G    0  bAydq6-rv9e-wCa0-iK2f-zFWn-UBUr-4AR3Ct
  VolGroup00 wz--n- 32.00M   1   2   0  74.41G    0  YHLmkq-b1xS-UzAS-Y3nv-6vaX-2Xou-GScvk0

查到数据盘的uuid是bAydq6-rv9e-wCa0-iK2f-zFWn-UBUr-4AR3Ct,改卷组名的时刻用uuid,以下:

[root@locallhost ~]# vgrename bAydq6-rv9e-wCa0-iK2f-zFWn-UBUr-4AR3Ct aaalvm
  Volume group "VolGroup00" successfully renamed to "aaalvm"

ok了,改完再vgs看下:

[root@locallhost ~]# vgs
  VG         #PV #LV #SN Attr   VSize   VFree
  VolGroup00   1   2   0 wz--n-  74.41G    0
  aaalvm       1   2   0 wz--n- 232.78G    0

没问题了,再lvscan下:

[root@locallhost ~]# lvscan
  inactive          '/dev/aaalvm/LogVol00' [228.84 GB] inherit
  inactive          '/dev/aaalvm/LogVol01' [3.94 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [70.47 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [3.94 GB] inherit

已经看到新改名的卷组是inactive了,2个分区LogVol00和LogVol01,用vgchange加载我们该名过的aaalvm卷组:

[root@locallhost ~]# vgchange -ay /dev/aaalvm
  2 logical volume(s) in volume group "aaalvm" now active

提醒active状况成功,最后mount文件系统:

[root@locallhost ~]# ls /dev/aaalvm/
LogVol00  LogVol01
[root@locallhost ~]# mount /dev/aaalvm/LogVol00 /aaaa/
[root@locallhost ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       69G  2.7G   63G   5% /
/dev/hda1              99M   12M   82M  13% /boot
tmpfs                1010M     0 1010M   0% /dev/shm
/dev/mapper/aaalvm-LogVol00
                      222G  111G  100G  53% /aaaa 
[root@locallhost ~]# mount /dev/aaalvm/LogVol01 /bbb/
/dev/aaalvm/LogVol01 looks like swapspace - not mounted
mount: you must specify the filesystem type

LogVol01是swap分区,不用挂载.把/bin/mount /dev/aaalvm/LogVol00 /aaaa/写入rc.local里面,让每次开机自动挂载,也可以写到fstab里面,但是假如写错出问题大概招致进不了系统,所以倡议写rc.local.

本篇文章根源于 Vitter's Blog