怎么恢復(fù)丟失掉LVM 卷的組？我不能使用vgscan 和 lvmdiskscan 檢測到。

我一個(gè)老機(jī)器系統(tǒng)壞掉了，數(shù)據(jù)都在上面，然后我重新用了一個(gè)新的機(jī)器，然后把老機(jī)器的硬盤卸載，安裝到新機(jī)器上面。

我使用vgscan去檢測我的舊的磁盤，但是沒有發(fā)現(xiàn)任何volume group.

我使用lvmdiskscan 去尋找我的舊的物理磁盤, 但是lvmdiskscan沒有找到它。 下面就是我的 lvmdiskscan 輸出結(jié)果:

[root@localhost mapper]# lvmdiskscan
  /dev/ram0             [      16.00 MiB] 
  /dev/loop0            [     930.53 GiB] 
  /dev/root             [      50.00 GiB] 
  /dev/ram1             [      16.00 MiB] 
  /dev/sda1             [     500.00 MiB] 
  /dev/VolGroup/lv_swap [       7.05 GiB] 
  /dev/ram2             [      16.00 MiB] 
  /dev/sda2             [     931.02 GiB] 
  /dev/VolGroup/lv_home [     873.97 GiB] 
  /dev/ram3             [      16.00 MiB] 
  /dev/ram4             [      16.00 MiB] 
  /dev/ram5             [      16.00 MiB] 
  /dev/ram6             [      16.00 MiB] 
  /dev/ram7             [      16.00 MiB] 
  /dev/ram8             [      16.00 MiB] 
  /dev/ram9             [      16.00 MiB] 
  /dev/ram10            [      16.00 MiB] 
  /dev/ram11            [      16.00 MiB] 
  /dev/ram12            [      16.00 MiB] 
  /dev/ram13            [      16.00 MiB] 
  /dev/ram14            [      16.00 MiB] 
  /dev/ram15            [      16.00 MiB] 
  /dev/sdb1             [     500.00 MiB] 
  /dev/sdb2             [     931.02 GiB] LVM physical volume
  3 disks
  20 partitions
  0 LVM physical volume whole disks
  1 LVM physical volume

lvmdiskscan 只能發(fā)現(xiàn)LVM physical volume, 是我新的機(jī)器的 lvm 它是， /dev/sdb2.

下面是 fdisk -l 的輸出結(jié)果:

[root@localhost mapper]# fdisk -l 

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x2cbfcf8a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64      121602   976248832   8e  Linux LVM

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xe8a4e8a4

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sdb2              64      121602   976248832   8e  Linux LVM

Disk /dev/mapper/VolGroup-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes

/dev/sda2 是我的舊的磁盤的 lvm。