[linux-lvm] VG dissappeared without a trace?
IpSo
ipso at snappymail.ca
Sun Jan 6 13:03:02 UTC 2002
A follow up to this, I downloaded uuid_fixer to see if it would help, here's
what I tried:
[root at ipso uuid_fixer]# ./uuid_fixer /dev/hda6
Error: number of PVs passed in does not match number of PVs in /dev/hda6's VG
1 PVs were passed in and 2 were expected.
[root at ipso uuid_fixer]# ./uuid_fixer /dev/hda6 /dev/hdb6
Error: number of PVs passed in does not match number of PVs in /dev/hdb6's VG
2 PVs were passed in and 3 were expected.
Hrmm, so it must be looking for the partition I deleted on /dev/hdc. :( I
re-created the partition just to see:
[root at ipso uuid_fixer]# ./uuid_fixer /dev/hda6 /dev/hdb6 /dev/hdc1
Error: number of PVs passed in does not match number of PVs in /dev/hda6's VG
3 PVs were passed in and 2 were expected.
Figures. I guess I don't have a backup of the vgcfg when /dev/hda6 was all alone
in the VG "quantum". Thats the last time it was working correctly. :(
Quoting IpSo <ipso at snappymail.ca>:
> I was trying to extend my LVM partition to another disk, but being late and
> my
> head not screwed on straight, things went terribly wrong.
>
> I was using diskdrake (from Mandrake) and what I did was create a LVM
> partition
> /dev/hdb6 and added it to my "quantum" VG which contained a single partition
> of
> /dev/hda6. I was simply doing this as a test (my first time using LVM), so
> as
> soon as it worked, I removed /dev/hdb6 from the "quantum" VG. I then
> proceeded
> to create a larger partition /dev/hdc that I wanted to add to "quantum" for
> good. I added it to the "quantum" VG and attemped to resize the "quantum" VG
> to
> the full size of both /dev/hda6 (17gb) and /dev/hdc (12gb). Everything
> "seemed"
> to go fine, so I exited from diskdrake and rebooted.
>
> During the reboot, it said it couldn't mount /dev/quantum/1 as it was not a
> proper block device. So I ran the following programs to try and collect as
> much
> data as possible:
>
> [root at ipso root]# pvscan -v
> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- walking through all physical volumes found
> pvscan -- inactive PV "/dev/hda6" is associated to an unknown VG (run
> vgscan)
> pvscan -- inactive PV "/dev/hdb6" is associated to an unknown VG (run
> vgscan)
> pvscan -- total: 2 [19.01 GB] / in use: 2 [19.01 GB] / in no VG: 0 [0]
>
> [root at ipso root]# vgscan -v
> vgscan -- removing "/etc/lvmtab" and "/etc/lvmtab.d"
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- no volume groups found
>
>
> vgcfgrestore -n quantum -l -f /etc/lvmconf/quantum.conf.1.old
> --- Volume group ---
> VG Name quantum
> VG Access read/write
> VG Status NOT available/resizable
> VG # 0
> MAX LV 256
> Cur LV 1
> Open LV 0
> MAX LV Size 255.99 GB
> Max PV 256
> Cur PV 2
> Act PV 2
> VG Size 19 GB
> PE Size 4 MB
> Total PE 4865
> Alloc PE / Size 4328 / 16.91 GB
> Free PE / Size 537 / 2.1 GB
> VG UUID 54LQnu-1gQl-mNuO-KR7U-yypa-woKi-iu7PRF
>
> [root at ipso lvmconf]# vgcfgrestore -n quantum -l -f
> /etc/lvmconf/quantum.conf
> --- Volume group ---
> VG Name quantum
> VG Access read/write
> VG Status NOT available/resizable
> VG # 0
> MAX LV 256
> Cur LV 1
> Open LV 0
> MAX LV Size 255.99 GB
> Max PV 256
> Cur PV 3
> Act PV 3
> VG Size 30.88 GB
> PE Size 4 MB
> Total PE 7904
> Alloc PE / Size 4328 / 16.91 GB
> Free PE / Size 3576 / 13.97 GB
> VG UUID 54LQnu-1gQl-mNuO-KR7U-yypa-woKi-iu7PRF
>
>
> [root at ipso lvmconf]# pvdata -a /dev/hda6
>
> --- Physical volume ---
> PV Name /dev/hda6
> VG Name quantum
> PV Size 16.91 GB / NOT usable 3.12 MB [LVM: 137 KB]
> PV# 1
> PV Status NOT available
> Allocatable yes (but full)
> Cur LV 1
> PE Size (KByte) 4096
> Total PE 4328
> Free PE 0
> Allocated PE 4328
> PV UUID e42Ge3-mpoP-PNat-1xLg-TMjr-4hRU-Q2agG9
>
> --- Volume group ---
> VG Name
> VG Access read/write
> VG Status NOT available/resizable
> VG # 0
> MAX LV 256
> Cur LV 1
> Open LV 0
> MAX LV Size 255.99 GB
> Max PV 256
> Cur PV 2
> Act PV 2
> VG Size 19 GB
> PE Size 4 MB
> Total PE 4865
> Alloc PE / Size 4328 / 16.91 GB
> Free PE / Size 537 / 2.1 GB
> VG UUID 54LQnu-1gQl-mNuO-KR7U-yypa-woKi-iu7PRF
>
> --- List of logical volumes ---
>
> pvdata -- logical volume "/dev/quantum/1" at offset 0
> pvdata -- logical volume struct at offset 1 is empty
> pvdata -- logical volume struct at offset 2 is empty
> pvdata -- logical volume struct at offset 3 is empty
> pvdata -- logical volume struct at offset 4 is empty
> pvdata -- logical volume struct at offset 5 is empty
> pvdata -- logical volume struct at offset 6 is empty
> pvdata -- logical volume struct at offset 7 is empty
> pvdata -- logical volume struct at offset 8 is empty
> pvdata -- logical volume struct at offset 9 is empty
> pvdata -- logical volume struct at offset 10 is empty
> ...
> pvdata -- logical volume struct at offset 254 is empty
> pvdata -- logical volume struct at offset 255 is empty
>
> --- List of physical extents ---
>
> PE: 00000 LV: 001 LE: 00000
> PE: 00001 LV: 001 LE: 00001
> PE: 00002 LV: 001 LE: 00002
> ...
> PE: 04326 LV: 001 LE: 04326
> PE: 04327 LV: 001 LE: 04327
> --- List of physical volume UUIDs ---
>
> 000: e42Ge3mpoPPNat1xLgTMjr4hRUQ2agG9
> 001: --- EMPTY ---
>
>
>
> [root at ipso lvmconf]# pvdata -a /dev/hdb6
>
>
> --- Physical volume ---
> PV Name /dev/hdb6
> VG Name quantum
> PV Size 2.1 GB / NOT usable 1.75 MB [LVM: 123 KB]
> PV# 2
> PV Status NOT available
> Allocatable yes
> Cur LV 0
> PE Size (KByte) 4096
> Total PE 537
> Free PE 537
> Allocated PE 0
> PV UUID PFyl3d-HSJD-adUL-vpzS-Sib3-jy78-tgR569
>
> --- Volume group ---
> VG Name
> VG Access read/write
> VG Status NOT available/resizable
> VG # 0
> MAX LV 256
> Cur LV 1
> Open LV 0
> MAX LV Size 255.99 GB
> Max PV 256
> Cur PV 3
> Act PV 3
> VG Size 30.88 GB
> PE Size 4 MB
> Total PE 7904
> Alloc PE / Size 4328 / 16.91 GB
> Free PE / Size 3576 / 13.97 GB
> VG UUID 54LQnu-1gQl-mNuO-KR7U-yypa-woKi-iu7PRF
>
> --- List of logical volumes ---
>
> pvdata -- logical volume "/dev/quantum/1" at offset 0
> pvdata -- logical volume struct at offset 1 is empty
> pvdata -- logical volume struct at offset 2 is empty
> pvdata -- logical volume struct at offset 3 is empty
> ...
> pvdata -- logical volume struct at offset 254 is empty
> pvdata -- logical volume struct at offset 255 is empty
>
> --- List of physical extents ---
>
> PE: 00000 LV: --- LE: -----
> PE: 00001 LV: --- LE: -----
> PE: 00002 LV: --- LE: -----
> ...
> PE: 00535 LV: --- LE: -----
> PE: 00536 LV: --- LE: -----
> --- List of physical volume UUIDs ---
>
> 000: e42Ge3mpoPPNat1xLgTMjr4hRUQ2agG9
> 001: PFyl3dHSJDadULvpzSSib3jy78tgR569
> 002: TeWEsY1qLF4PPwfZAlljyT3KiE4CCajd
>
>
> Unfortunately, I deleted the partition from the larger drive I was planning
> on
> adding to the "quantum" VG, (/dev/hdc it didn't have any data on it yet). I
> don't really care about /dev/hdb6 either, I would just like the data off of
> /dev/hda6.
>
> Partition table for: /dev/hda6
> Device Boot Start End Blocks Id System
> /dev/hda1 * 1 507 255496+ 82 Linux swap
> /dev/hda2 508 39813 19810224 5 Extended
> /dev/hda5 508 4633 2079472+ 83 Linux
> /dev/hda6 4634 39813 17730688+ 8e Linux LVM
>
> Any ideas how I can get /dev/hda6 mountable again? Thanks.
>
> IpSo
>
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IpSo
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