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Old 07-29-2013, 06:11 PM   #1
s1syphus
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Registered: Jul 2013
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Trouble Restoring LVM Volume Group


Hi, I'm having a problem using vgcfgrestore to restore a volume group after I accidentally deleted it. According to the man pages the correct syntax for the vgcfgrestore command (for my computer, vg is the volume group name) is as follows:
vgcfgrestore -f /etc/lvm/archive/vg_00011-464224295.vg vg
However, when I use vgdisplay after it says the volume group has been restored nothing has changed. Looking at the backup file it looks correct but the group has not been changed. Can anyone help me out? This is my first time using LVM and I'm not sure what I'm doing wrong
 
Old 07-29-2013, 06:50 PM   #2
Ser Olmy
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Quote:
Originally Posted by s1syphus View Post
HAccording to the man pages the correct syntax for the vgcfgrestore command (for my computer, vg is the volume group name) is as follows:
vgcfgrestore -f /etc/lvm/archive/vg_00011-464224295.vg vg
Are you sure the file in /etc/lvm/archive is the most recent? Are there no files in /etc/lvm/backup?

Could you post the contents of the backup/archive file, as well as the output from the vgcfgrestore command?
 
Old 07-29-2013, 08:05 PM   #3
s1syphus
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The file that I'm trying to backup from isn't the most recent but has the disk configuration I want to restore to. I had a working volume group of 2 disks (with data) then tried adding a 3rd, messed up (different problem that I think I solved) but need to restore the previous configuration in order to retrieve the data from before. The problem is the file I'm specifying shows two physical volumes as well as two logical volumes, which is correct but when I try to restore there's still 3 disks in the volume group. I attached the .vg file and the output for the vgcfgrestore command was:

Restored volume group vg

Running "vgdisplay" gave:

--- Volume group ---
VG Name vg
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 24
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 3
Act PV 3
VG Size 8.19 TiB
PE Size 4.00 MiB
Total PE 2146188
Alloc PE / Size 0 / 0
Free PE / Size 2146188 / 8.19 TiB
VG UUID Kyuubf-8YdL-uNln-ejA2-SH5J-KROO-yipBWE

Thanks!
Attached Files
File Type: txt vg_00011-464224295.vg.txt (2.3 KB, 10 views)
 
Old 07-29-2013, 08:21 PM   #4
Ser Olmy
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Quote:
Originally Posted by s1syphus View Post
The problem is the file I'm specifying shows two physical volumes as well as two logical volumes, which is correct but when I try to restore there's still 3 disks in the volume group.
I'm not sure it's possible to remove a physical volume from a volume group by simply restoring an older configuration file. There are probably metadata on all physical volumes in the group that refers to the volume group configuration, and there may even be data on the physical volume in question.

Why can't you use pvremove to get rid of the physical volume?
 
  


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