Hi Guys, I uses lvm2-2.02.180, I got an error message when running lvs/lvdisplay against cached LVs. e.g. linux-v5ay:~ # lvs Unknown feature in status: 8 1324/8192 128 341/654272 129 151 225 1644 0 341 0 3 metadata2 writethrough no_discard_passdown 2 migration_threshold 2048 smq 0 rw - LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert home system -wi-ao---- 17.99g root system Cwi-aoC--- 20.00g [lvc_root] [root_corig] 0.05 16.16 0.00 swap system -wi-ao---- 2.00g The bug can be reproduced stably with the below steps. Have a (virtual) machine with 2 disk drives Install os with LVM as root volume Then, add the second disk after os is installed. # pvcreate /dev/sdb # vgextend system /dev/sdb # lvcreate --type cache-pool -l 100%FREE -n lvc_root system /dev/sdb # lvconvert --type cache --cachepool system/lvc_root system/root then run `lvs` or `lvdisplay` command to trigger the issue Thanks Gang _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
