RHEL 6中的 lvm恢复

系统情况：Red Hat Enterprise Linux Server release 6.0，lvm2，ext4

原来有一个lvm分区/dev/data/ftproot挂载到/work目录下的。 周一的时候由于调休，不知道那个BT直接关机造成data_ftproot的lvm丢失

 

下是记录下的处理过程：

 

[root@localhost lvm]# vgcfgrestore -f /etc/lvm/backup/data -t /dev/sda3
  Test mode: Metadata will NOT be updated.
  Couldn't find device with uuid h6t9V2-Oi08-F5kw-U2G5-vRDW-1WdJ-1awgnU.
  '/etc/lvm/backup/data' does not contain volume group 'sda3'.
  Restore failed.

[root@localhost lvm]# pvcreate -u h6t9V2-Oi08-F5kw-U2G5-vRDW-1WdJ-1awgnU --restorefile /etc/lvm/archive/data_00002.vg /dev/sda3
  Couldn't find device with uuid h6t9V2-Oi08-F5kw-U2G5-vRDW-1WdJ-1awgnU.
  Physical volume "/dev/sda3" successfully created

[root@localhost lvm]# vgcfgrestore data
  Restored volume group data
[root@localhost lvm]# vgscan && vgscan && lvscan
  Reading all physical volumes. This may take a while...
  Found volume group "data" using metadata type lvm2
  Found volume group "vg_localhost" using metadata type lvm2
  Reading all physical volumes. This may take a while...
  Found volume group "data" using metadata type lvm2
  Found volume group "vg_localhost" using metadata type lvm2
  inactive '/dev/data/ftproot' [70.00 GiB] inherit
  ACTIVE '/dev/vg_localhost/lv_root' [21.55 GiB] inherit
  ACTIVE '/dev/vg_localhost/lv_swap' [1.97 GiB] inherit


You can now display the logical volumes.

[root@localhost ~]# lvs -a -o +devices
  LV VG Attr LSize Origin Snap% Move Log Copy% Convert Devices
  ftproot data -wi--- 70.00g /dev/sda3(0)
  lv_root vg_localhost -wi-ao 21.55g /dev/sda2(0)
  lv_swap vg_localhost -wi-ao 1.97g /dev/sda2(5518)


[root@link-07 backup]# lvchange -ay /dev/VG/stripe
[root@localhost ~]# lvchange -ay /dev/data/ftproot
[root@localhost ~]# lvs -a -o +devices
  LV VG Attr LSize Origin Snap% Move Log Copy% Convert Devices
  ftproot data -wi-a- 70.00g /dev/sda3(0)
  lv_root vg_localhost -wi-ao 21.55g /dev/sda2(0)
  lv_swap vg_localhost -wi-ao 1.97g /dev/sda2(5518)


[root@localhost ~]# mount -t ext4 /dev/data/ftproot /work/
mount: wrong fs type, bad option, bad superblock on /dev/mapper/data-ftproot,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail or so

[root@localhost ~]# dmesg | tail -10
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
SELinux: initialized (dev rpc_pipefs, type rpc_pipefs), uses genfs_contexts
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
eth3: no IPv6 routers present
eth1: no IPv6 routers present
EXT4-fs (dm-2): VFS: Can't find ext4 filesystem

至此，lvm是恢复了，但文件系统看样子是没有办法恢复了。参考“ext3 文件系统超级块损坏的修复”对ext4不起作用，我觉得对ext3/ext2估计都差不多。