You used pvcreate without the required options to create the physical in your new disk and set the old uuid example: pvcreate --uuid "FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk" --restorefile /etc/lvm/archive/VG_00050.vg /dev/sdh1 https://www.centos.org/docs/5/html/Cluster_Logical_Volume_Manager/mdatarecover.html 2016-02-01 0:00 GMT+01:00 Pavlik Kirilov <pavllik@yahoo.ca>: > Hi, > > I am encountering strange behaviour when trying to recover a Raid 10 LV, created with the following command: > > > lvcreate --type raid10 -L3G -i 2 -I 256 -n lv_r10 vg_data /dev/vdb1:1-500 /dev/vdc1:1-500 /dev/vdd1:1-500 /dev/vde1:1-500 > > As it can be seen, I have 4 PVs and give the first 500 PE of each of them for the raid 10 logical volume. I am able to see the following PE layout: > > lvs -o seg_pe_ranges,lv_name,stripes -a > > PE Ranges LV #Str > lv_r10_rimage_0:0-767 lv_r10_rimage_1:0-767 lv_r10_rimage_2:0-767 lv_r10_rimage_3:0-767 lv_r10 4 > /dev/vdb1:2-385 [lv_r10_rimage_0] 1 > /dev/vdc1:2-385 [lv_r10_rimage_1] 1 > /dev/vdd1:2-385 [lv_r10_rimage_2] 1 > /dev/vde1:2-385 [lv_r10_rimage_3] 1 > /dev/vdb1:1-1 [lv_r10_rmeta_0] 1 > /dev/vdc1:1-1 [lv_r10_rmeta_1] 1 > /dev/vdd1:1-1 [lv_r10_rmeta_2] 1 > /dev/vde1:1-1 [lv_r10_rmeta_3] 1 > > > So far everything is OK and the number of PE is automatically reduced to 385 per PV to have the size equal to 3 Gigabytes. > > The problem comes when I shut down the system, replace one disk (vdc), boot again and try to recover the array. Here are the commands I execute: > pvs > Couldn't find device with uuid 2hU2pD-xNDa-yi1J-OkkP-NjGq-hIxo-Q5AgQC. > PV VG Fmt Attr PSize PFree > /dev/vdb1 vg_data lvm2 a-- 8.00g 6.49g > /dev/vdd1 vg_data lvm2 a-- 8.00g 6.49g > /dev/vde1 vg_data lvm2 a-- 8.00g 6.49g > unknown device vg_data lvm2 a-m 8.00g 6.49g > > pvcreate /dev/vdc1 > Physical volume "/dev/vdc1" successfully created > > vgextend vg_data /dev/vdc1 > Couldn't find device with uuid 2hU2pD-xNDa-yi1J-OkkP-NjGq-hIxo-Q5AgQC > Volume group "vg_data" successfully extended > > lvs -o seg_pe_ranges,lv_name,stripes -a > Couldn't find device with uuid 2hU2pD-xNDa-yi1J-OkkP-NjGq-hIxo-Q5AgQC. > PE Ranges LV #Str > lv_r10_rimage_0:0-767 lv_r10_rimage_1:0-767 lv_r10_rimage_2:0-767 lv_r10_rimage_3:0-767 lv_r10 4 > /dev/vdb1:2-385 [lv_r10_rimage_0] 1 > unknown device:2-385 [lv_r10_rimage_1] 1 > /dev/vdd1:2-385 [lv_r10_rimage_2] 1 > /dev/vde1:2-385 [lv_r10_rimage_3] 1 > /dev/vdb1:1-1 [lv_r10_rmeta_0] 1 > unknown device:1-1 [lv_r10_rmeta_1] 1 > /dev/vdd1:1-1 [lv_r10_rmeta_2] 1 > /dev/vde1:1-1 [lv_r10_rmeta_3] 1 > > lvchange -ay --partial /dev/vg_data/lv_r10 > PARTIAL MODE. Incomplete logical volumes will be processed. > Couldn't find device with uuid 2hU2pD-xNDa-yi1J-OkkP-NjGq-hIxo-Q5AgQC > > lvconvert --repair vg_data/lv_r10 /dev/vdc1:1-385 > Attempt to replace failed RAID images (requires full device resync)? [y/n]: y > Insufficient free space: 770 extents needed, but only 345 available > Failed to allocate replacement images for vg_data/lv_r10 > > lvconvert --repair vg_data/lv_r10 > Attempt to replace failed RAID images (requires full device resync)? [y/n]: y > Faulty devices in vg_data/lv_r10 successfully replaced. > > lvs -o seg_pe_ranges,lv_name,stripes -a > Couldn't find device with uuid > 2hU2pD-xNDa-yi1J-OkkP-NjGq-hIxo-Q5AgQC. > > PE Ranges LV #Str > lv_r10_rimage_0:0-767 lv_r10_rimage_1:0-767 lv_r10_rimage_2:0-767 lv_r10_rimage_3:0-767 lv_r10 4 > /dev/vdb1:2-385 [lv_r10_rimage_0] 1 > /dev/vdc1:1-768 [lv_r10_rimage_1] 1 > /dev/vdd1:2-385 [lv_r10_rimage_2] 1 > /dev/vde1:2-385 [lv_r10_rimage_3] 1 > /dev/vdb1:1-1 [lv_r10_rmeta_0] 1 > /dev/vdc1:0-0 [lv_r10_rmeta_1] 1 > /dev/vdd1:1-1 [lv_r10_rmeta_2] 1 > /dev/vde1:1-1 [lv_r10_rmeta_3] 1 > > The array was recovered, but it is definitely not what I expected, because on /dev/vdc1 now 768 PEs are used instead of 385, like on the other PVs. In this case I had some extra free space on /dev/vdc1, but what if I did not? Please, suggest what should be done. > > Linux ubuntu1 3.13.0-32-generic, x86_64 > LVM version: 2.02.98(2) (2012-10-15) > Library version: 1.02.77 (2012-10-15) > Driver version: 4.27.0 > > Pavlik Petrov > > _______________________________________________ > 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/ -- .~. /V\ // \\ /( )\ ^`~'^ _______________________________________________ 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/
