Hi,
We had an OS crash on x86_64 CentOS , LVM2 and it had 6TB LUN via IP SCSI SAN mounted to it and after the OS reinstall on a crash we had hard time to mount the original SAN volume as you can imagine 6TB of marketing data with 3 LVM partitions as data data1 and data2 . After troubleshooting almost for a day I was able to get the LVM metadata using dd from the SAN LUN /dev/sdd1 which I used to recreate and restore all LVM partitions back to original state , we sure became the raving fans of LVM today ! however after all the recovery I see this annoying warning each time I execute any of the lvm commands ..
lvs
Found duplicate PV XtGmeFOiCTWpLBckKZKlGtYKPVdBgVJn: using /dev/sdd1 not /dev/sdc1
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
data vg0 -wi-ao 2.00T
data1 vg0 -wi-ao 2.00T
data2 vg0 -wi-ao 1.44T
I believe previously we had created PV using /dev/sdd1 and /dev/sdc1 although from the same LUN but now I was able to restore everything using just /dev/sdd1 and everything looks intact (until I hear marketing whine tom:)
vgs -o +devices
Found duplicate PV XtGmeFOiCTWpLBckKZKlGtYKPVdBgVJn: using /dev/sdd1 not /dev/sdc1
VG #PV #LV #SN Attr VSize VFree Devices
vg0 1 3 0 wz--n- 5.45T 8.06G /dev/sdd1(0)
vg0 1 3 0 wz--n- 5.45T 8.06G /dev/sdd1(524288)
vg0 1 3 0 wz--n- 5.45T 8.06G /dev/sdd1(1048576)
lvs -P -a -o +devices
Partial mode. Incomplete logical volumes will be processed.
Found duplicate PV XtGmeFOiCTWpLBckKZKlGtYKPVdBgVJn: using /dev/sdd1 not /dev/sdc1
LV VG Attr LSize Origin Snap% Move Log Copy% Convert Devices
data vg0 -wi-ao 2.00T /dev/sdd1(0)
data1 vg0 -wi-ao 2.00T /dev/sdd1(524288)
data2 vg0 -wi-ao 1.44T /dev/sdd1(1048576)
I tried to fix this by but it just won't go..
vgreduce --removemissing vg0
Found duplicate PV XtGmeFOiCTWpLBckKZKlGtYKPVdBgVJn: using /dev/sdd1 not /dev/sdc1
Volume group "vg0" is already consistent
why does LVM think that it's still using PV ( /dev/sdc1 ) when it no more exists ? and how do i get rid of it ?
I also see some of these in syslog messages
hfs: unable to find HFS+ superblock
hfs: unable to find HFS+ superblock
VFS: Can't find ext3 filesystem on dev sdc1.
VFS: Can't find ext3 filesystem on dev sdc1.
hfs: unable to find HFS+ superblock
VFS: Can't find ext3 filesystem on dev sdc1.
VFS: Can't find ext3 filesystem on dev sdc1.
VFS: Can't find ext3 filesystem on dev sdd1.
thx,
Tariq
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