I use XFS when I am going to use snapshots. It has a mount option to ignore the UUID conflict. On Thu, 6 Jan 2005 17:14:34 +0100, gilles.massen@restena.lu <gilles.massen@restena.lu> wrote: > Hello everyone, > > Some time ago I had a problem accessing a hardware snapshot of an LVM2 > partition. The reason: different physical volumes having the same UUIDs. > The advice I was given was to use the "pvchange --uuid" command, but I'm > unable to use that command whitout making the PV unusable. > > What happens is this: the PV is there, it is found, but becomes an > "unknown" device. pvdisplay and pvdisplay <device> disagree somewhat, > andit seems as if the old uuid is sticking around. vgscan or pvscan are of > no use. > > Now I have no idea what else to try... BTW, I also failed having two > instances of LVM by setting LVM_SYSTEM_DIR: the second instance still > finds the PVs of the first even...even with the appropriate filters. > > Any ideas how to continue here? For the time beeing the hardware snapshots > are not very useful... > > Best, > Gilles > > Example: initial pvdisplay: > > --- Physical volume --- > PV Name /dev/sdb1 > VG Name vg-test > PV Size 1020.00 MB / not usable 0 > Allocatable yes (but full) > PE Size (KByte) 4096 > Total PE 255 > Free PE 0 > Allocated PE 255 > PV UUID v3Oknf-6Rqa-Gh72-k0GO-c3I6-eoKS-odPWVr > > # pvchange -v --uuid /dev/sdb1 > Using physical volume(s) on command line > Finding volume group of physical volume "/dev/sdb1" > Archiving volume group "vg-test" metadata. > Updating physical volume "/dev/sdb1" > Creating volume group backup "/etc/lvm/backup/vg-test" > Physical volume "/dev/sdb1" changed > 1 physical volume changed / 0 physical volumes not changed > > #pvdisplay -v > Scanning for physical volume names > Couldn't find device with uuid 'GaTpFU-XgFz-HRH2-Mtyb-GI1f-4LN4-TOe8FK'. > --- Physical volume --- > PV Name unknown device > VG Name vg-test > PV Size 1020.00 MB / not usable 0 > Allocatable yes (but full) > PE Size (KByte) 4096 > Total PE 255 > Free PE 0 > Allocated PE 255 > PV UUID GaTpFU-XgFz-HRH2-Mtyb-GI1f-4LN4-TOe8FK > > or else:# pvdisplay -v /dev/sdb1 > Using physical volume(s) on command line > Couldn't find device with uuid 'GaTpFU-XgFz-HRH2-Mtyb-GI1f-4LN4-TOe8FK'. > Couldn't find all physical volumes for volume group vg-test. > format_text: _vg_read failed to read VG vg-test > Couldn't find device with uuid 'GaTpFU-XgFz-HRH2-Mtyb-GI1f-4LN4-TOe8FK'. > Couldn't find all physical volumes for volume group vg-test. > format_text: _vg_read failed to read VG vg-test > --- NEW Physical volume --- > PV Name /dev/sdb1 > VG Name > PV Size 1023.62 MB > Allocatable NO > PE Size (KByte) 0 > Total PE 0 > Free PE 0 > Allocated PE 0 > PV UUID v3Oknf-6Rqa-Gh72-k0GO-c3I6-eoKS-odPWVr > > # pvscan -v > Wiping cache of LVM-capable devices > Wiping internal cache > Walking through all physical volumes > Couldn't find device with uuid 'GaTpFU-XgFz-HRH2-Mtyb-GI1f-4LN4-TOe8FK'. > PV unknown device VG vg-test lvm2 [1020.00 MB / 0 free] > PV /dev/cciss/c0d0p6 VG data-vg lvm2 [8.00 GB / 0 free] > Total: 2 [9.00 GB] / in use: 2 [9.00 GB] / in no VG: 0 [0 ] > > -- > RESTENA - DNS-LU > 6, rue Coudenhove-Kalergi > L-1359 Luxembourg > tel: (+352) 424409 > fax: (+352) 422473 > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
