CentOS无法挂载lvm格式硬盘解决办法

使用 pvs 查看显示如下:

代码如下
[root@localhost ~]# pvs PV        VG         Fmt  Attr PSize   PFree /dev/sda2 VolGroup00 lvm2 a- 372.50G 0 /dev/sdb2 VolGroup00 lvm2 a- 136.62G 0

发现可以正确认别到两个VG,但是同名,如何挂载呢?
解决办法是,将原来的VG更名,解决冲突即可挂载。

重命名格式为:vgrename VolGroup00 VolGroup01
此时会提示:

代码如下
[root@localhost ~]# vgrename VolGroup00 VolGroup01 Found more than one VG called VolGroup00. Please supply VG uuid.

原因是存在两个 VolGroup00,修改的方法他已经提示了要指定 VG uuid即可。

查看VG uuid的命令为:

代码如下
[root@localhost ~]# vgs -v Finding all volume groups Finding volume group "VolGroup00" Finding volume group "VolGroup00" VG Attr Ext #PV #LV #SN VSize VFree VG UUID VolGroup00 wz--n- 32.00M 120372.50G 0 dcHa6G-abU2-Xfq8-EPBm-jBLj-sf18-O5uH0U VolGroup00 wz--n- 32.00M 120136.62G 0 OF8g7h-PQJB-9D9z-yPxn-1kfY-Advq-YbNHJ9

查到VG uuid以后,再次执行改名:

代码如下
[root@localhost ~]# vgrename OF8g7h-PQJB-9D9z-yPxn-1kfY-Advq-YbNHJ9 VolGroup01 Volume group "VolGroup00" still has active LVs

修改成功以后,再执行:lvscan

代码如下
[root@localhost ~]# lvscan inactive '/dev/VolGroup01/LogVol00' [130.84 GB] inherit inactive '/dev/VolGroup01/LogVol01' [1.94 GB] inherit ACTIVE '/dev/VolGroup00/LogVol00' [367.09 GB] inherit ACTIVE '/dev/VolGroup00/LogVol01' [5.41 GB] inherit

可以看到新修改的VolGroup01是inactive状态。

再使用vgchange 加载 VolGroup01

代码如下
[root@localhost ~]# vgchange -ay /dev/VolGroup01 2 logical volume(s) in volume group "VolGroup01" now active

再执行 :lvscan

代码如下
[root@localhost ~]# lvscan ACTIVE            '/dev/VolGroup01/LogVol00' [134.69 GB] inherit ACTIVE            '/dev/VolGroup01/LogVol01' [1.94 GB] inherit ACTIVE            '/dev/VolGroup00/LogVol00' [367.09 GB] inherit ACTIVE            '/dev/VolGroup00/LogVol01' [5.41 GB] inherit

可以发现VolGroup01已经是ACTIVE状态了。

最后 mount 就可以

代码如下
[root@localhost ~]# mount /dev/VolGroup01/LogVol00 /data/www

附解决办法二

 

代码如下

[root@MyVPS ~]# fdisk -l //*查看硬盘分区情况*//   Disk /dev/xvda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes       Device Boot      Start         End      Blocks   Id  System /dev/xvda1   *           1          13      104391   83  Linux /dev/xvda2              14        1044     8281507+  8e  Linux LVM /dev/xvda3            1045        1305     2096482+  8e  Linux LVM   Disk /dev/xvdb: 7516 MB, 7516192768 bytes 255 heads, 63 sectors/track, 913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes   Disk /dev/xvdb doesn't contain a valid partition table [root@MyVPS ~]#df -hal //*查看已划分区空间使用情况*// Filesystem            Size  Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00                       9.3G  1.2G  7.7G  13% / proc                     0     0     0   -  /proc sysfs                    0     0     0   -  /sys devpts                   0     0     0   -  /dev/pts /dev/xvda1             99M   29M   66M  31% /boot tmpfs                 151M     0  151M   0% /dev/shm none                     0     0     0   -  /proc/sys/fs/binfmt_misc sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs [root@MyVPS ~]#fdisk /dev/xvdb //*对硬盘/dev/xvdb进行增加分区操作*// Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable.   Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)   Command (m for help):n //*输入n新建分区*// Command action    e   extended    p   primary partition (1-4) p //*输入p，主分区*// Partition number (1-4): 1 //*由于xvdb还没有分区.我们这里输入1.第1个分区*// First cylinder (1-913, default 1)://*回车跳过*// Using default value 1 Last cylinder or +size or +sizeM or +sizeK (1-913, default 913)://*回车跳过*// Using default value 913   Command (m for help): t //*通过t来指定分区系统格式*// Selected partition 1 Hex code (type L to list codes):8e //*输入8e LVM系统格式*// Changed system type of partition 1 to 8e (Linux LVM)   Command (m for help):w //*输入w保存退出*// The partition table has been altered!   Calling ioctl() to re-read partition table. Syncing disks. [root@MyVPS ~]#reboot //*重启使之生效*//   Broadcast message from root (pts/0) (Mon Aug 15 00:43:03 2011):   The system is going down for reboot NOW! [root@MyVPS ~]# Connection closed by foreign host.   Type `help' to learn how to use Xshell prompt. Xshell:>   Connecting to            :22... Connection established. Escape character is '^@]'.   Last login: Mon Aug 15 00:41:06 2011 from [root@MyVPS1280 ~]#fdisk -l //*查看硬盘分区情况*//   Disk /dev/xvda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes       Device Boot      Start         End      Blocks   Id  System /dev/xvda1   *           1          13      104391   83  Linux /dev/xvda2              14        1044     8281507+  8e  Linux LVM /dev/xvda3            1045        1305     2096482+  8e  Linux LVM   Disk /dev/xvdb: 7516 MB, 7516192768 bytes 255 heads, 63 sectors/track, 913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes       Device Boot      Start         End      Blocks   Id  System /dev/xvdb1               1         913     7333641   8e  Linux LVM [root@MyVPS1280 ~]#pvcreate /dev/xvdb1 //*创建物理卷*//   Physical volume "/dev/xvdb1" successfully created [root@MyVPS1280 ~]#vgextend VolGroup00 /dev/xvdb1 //*将物理卷加入到组VolGroup2011*//   Volume group "VolGroup00" successfully extended [root@MyVPS1280 ~]# vgdisplay //*查看物理卷组情况.可以看到我们有6.97G的容量可以扩展*//   --- Volume group ---   VG Name               VolGroup00   System ID              Format                lvm2   Metadata Areas        3   Metadata Sequence No  6   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                3   Act PV                3   VG Size               16.81 GB   PE Size               32.00 MB   Total PE              538   Alloc PE / Size       315 / 9.84 GB   Free  PE / Size       223 / 6.97 GB   VG UUID               ONGPxy-HBvY-xrrQ-IjEW-PIiO-2cX7-tg6tuI   [root@MyVPS1280 ~]# lvresize -L +6G /dev/VolGroup00/LogVol00 //*扩容6G(我们第一次加6G)*//   Extending logical volume LogVol00 to 15.59 GB   Logical volume LogVol00 successfully resized [root@MyVPS1280 ~]#resize2fs /dev/VolGroup00/LogVol00 //*动态扩容分区大小*// resize2fs 1.39 (29-May-2006) Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required Performing an on-line resize of /dev/VolGroup00/LogVol00 to 4087808 (4k) blocks. The filesystem on /dev/VolGroup00/LogVol00 is now 4087808 blocks long.   [root@MyVPS1280 ~]# vgdisplay //*查看物理卷组情况.可以看到我们还有992M的容量可以扩展*//   --- Volume group ---   VG Name               VolGroup00   System ID              Format                lvm2   Metadata Areas        3   Metadata Sequence No  7   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                3   Act PV                3   VG Size               16.81 GB   PE Size               32.00 MB   Total PE              538   Alloc PE / Size       507 / 15.84 GB   Free  PE / Size       31 / 992.00 MB   VG UUID               ONGPxy-HBvY-xrrQ-IjEW-PIiO-2cX7-tg6tuI   [root@MyVPS1280 ~]# lvresize -L +992M /dev/VolGroup00/LogVol00 //*扩容992M(我们第2次加992M)*//   Extending logical volume LogVol00 to 16.56 GB   Logical volume LogVol00 successfully resized [root@MyVPS1280 ~]# resize2fs /dev/VolGroup00/LogVol00 //*动态扩容分区大小*// resize2fs 1.39 (29-May-2006) Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required Performing an on-line resize of /dev/VolGroup00/LogVol00 to 4341760 (4k) blocks. The filesystem on /dev/VolGroup00/LogVol00 is now 4341760 blocks long.   [root@MyVPS1280 ~]#vgdisplay //*最后再查看扩容完没有 可以看到已经扩容完毕*//   --- Volume group ---   VG Name               VolGroup00   System ID              Format                lvm2   Metadata Areas        3   Metadata Sequence No  8   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                3   Act PV                3   VG Size               16.81 GB   PE Size               32.00 MB   Total PE              538   Alloc PE / Size       538 / 16.81 GB   Free  PE / Size       0 / 0    VG UUID               ONGPxy-HBvY-xrrQ-IjEW-PIiO-2cX7-tg6tuI   [root@MyVPS1280 ~]# df -hal //*查看已划分区空间使用情况 可以看到我们挂载成功*// Filesystem            Size  Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00                        17G  1.2G   15G   8% / proc                     0     0     0   -  /proc sysfs                    0     0     0   -  /sys devpts                   0     0     0   -  /dev/pts /dev/xvda1             99M   29M   66M  31% /boot tmpfs                 151M     0  151M   0% /dev/shm none                     0     0     0   -  /proc/sys/fs/binfmt_misc sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs

注意事项：

1. 教程所用主机为CentOS系统，不同Linux、不同服务器的VPS的卷标（本教程中那个的VolGroup00-LogVol00）可能不同，使用df-hal命令可以查看卷标。

2. 如果你使用的不是基本套餐或者你的硬盘不是15G，那么你两次操作需要增加的容量要以你vgdisplay所看到的为准，(vgidsplay里面的Free PE/Size显示的就是可扩容容量)。我们只所以分两次扩容是由于1024的进制差别造成的，我们所实际看到的容量6.97G并不能直接一次扩容，所以我们可以先扩容整数部分，然后扩容以M为单位的部分。

3. 系统重装后的重装扩展处理（仅格式化系统盘）
系统重装后，直接执行resize2fs进行动态扩容即可：

代码如下
resize2fs /dev/VolGroup2011/LogVol00

4. PVs missing导致LVM无法重新扩容的解决办法

运行vgextend/vgdisplay返回错误：

代码如下
Couldn’t find device with uuid ************************ Cannot change VG VolGroup2011 while PVs are missing.

此时可以运行：

代码如下
vgreduce VolGroup2011  –removemissing

然后重新扩容LVM即可。