[linux-lvm] recovering from VGDA loss
dan at veddma.com
Fri May 2 03:13:01 UTC 2003
I was running lvm with one PV [/dev/hdb3], making up one GV
[/dev/data], which was completely allocated to one LV
[/dev/data/homes]. My root was a separate harddisk [/dev/hda1]. Hda is
now gone, and so is my /etc, where my VGDA was.
Is there a way for me to get at the data that is still stored on
/dev/hdb3 (I am running slackware linux 9; linux-2.4.20, lvm-1.0.6)?
When I run pvscan I get the following:
root at ved:~# pvscan -v
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- walking through all physical volumes found
pvscan -- inactive PV "/dev/hdb3" is associated to unknown VG "data"
pvscan -- total: 1 [13.64 GB] / in use: 1 [13.64 GB] / in no VG: 0 
This suggests I run vgscan...
root at ved:~# vgscan -v
vgscan -- removing "/etc/lvmtab" and "/etc/lvmtab.d"
vgscan -- creating empty "/etc/lvmtab" and "/etc/lvmtab.d"
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- scanning for all active volume group(s) first
vgscan -- reading data of volume group "data" from physical volume(s)
vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of
volume group "data" from physical volume(s)
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume
vgimport segfaults on me when I try to import the VG as shown:
root at ved:~# vgimport -fv data /dev/hdb3
vgimport -- locking logical volume manager
vgimport -- checking volume group name
vgimport -- checking volume group "data" existence
vgimport -- trying to read physical volume
vgimport -- checking for duplicate physical volumes
vgimport -- checking physical volume name "/dev/hdb3"
vgimport -- reading data of physical volume "/dev/hdb3" from disk
vgimport -- checking for exported physical volume "/dev/hdb3"
vgimport -- checking consistency of physical volume "/dev/hdb3"
vgimport -- reallocating memory
"pvdata -P /dev/hdb3" yields
--- Physical volume ---
PV Name /dev/hdb3
VG Name data
PV Size 13.64 GB [28611765 secs] / NOT usable 4.19 MB
[LVM: 141 KB]
PV Status NOT available
Allocatable yes (but full)
Cur LV 1
PE Size (KByte) 4096
Total PE 3491
Free PE 0
Allocated PE 3491
PV UUID gdtjvf-8UHQ-SbSF-zmaG-7E0z-5olx-cCQRrI
Any help will be greatly appreciated. I am still sifting through the
linux-lvm archive, but I can't seem to find a case that resmbles mine
Daniel Barklon <dan at veddma.com>
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