[linux-lvm] Volume group not accessible

Matthias Meyer Matthias.Meyer at gmx.li
Thu Nov 24 22:42:02 UTC 2005

Hello group,

I've lost the access to one of my Voloume groups which consists of 
disk /dev/hdd1 (contains data) and device /dev/hdc1 (which contains no 
vdr:~# vgscan
vgscan -- reading all physical volumes (this may take a while...)
vgscan -- found active volume group "LVM"
vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of 
volume group "LVM2" 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 

I think I've made the following mistake:
vdr:~# vgchange -an LVM2
vgchange -- volume group "LVM2" successfully deactivated

vdr:~# pvcreate -vff /dev/hdc1
pvcreate -- locking logical volume manager
pvcreate -- checking physical volume name "/dev/hdc1"
pvcreate -- getting physical volume size
pvcreate -- checking maximum physical volume size
pvcreate -- checking partition type
pvcreate -- checking volume group name
pvcreate -- really INITIALIZE physical volume "/dev/hdc1" of volume group 
"LVM2" [y/n]? y
pvcreate -- WARNING: forcing physical volume creation on "/dev/hdc1" of 
volume group "LVM2"
pvcreate -- removing lvmtab entry
pvcreate -- creating new physical volume
pvcreate -- setting up physical volume for /dev/hdc1 with 195318207 sectors
pvcreate -- writing physical volume data to disk "/dev/hdc1"
pvcreate -- physical volume "/dev/hdc1" successfully created
pvcreate -- unlocking logical volume manager

But it exists:
vdr:~# dir /dev/LVM2/Media

And now I'm not sure how to gain access again.

Should I try to restore metadata with vgcfgrestore?
Is it possible that I lost my data if I try vgcfgrestore?

Or should I create a new Volume group and include the device /dev/hdd1 to 
this VG? If I do this, what the way to delete volume group LVM2?

Thanks in advance
Don't Panic

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