Hi! I just tested lv activation with a degraded raid1 thin pool. Unfortunately it looks like activation mode=degraded only works for plain raid1 lvs. If you add a thin pool, lvm won't activate it in degraded mode. (Unless you specify --activationmode partial, which is IMHO rather dangerous.) Is this the intended behavior? -------------------- 8< -------------------- # lvcreate --type raid1 -m 1 -n thinmeta -L100m vg1 /dev/sda2 /dev/sdb2 Logical volume "thinmeta" created. # lvcreate --type raid1 -m 1 -n Thin -L2g vg1 /dev/sda2 /dev/sdb2 Logical volume "Thin" created. # lvconvert -y --type thin-pool --poolmetadata vg1/thinmeta vg1/Thin Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data. WARNING: Converting logical volume vg1/Thin and vg1/thinmeta to thin pool's data and metadata volumes with metadata wiping. THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.) Converted vg1/Thin_tdata to thin pool. # vgchange -a n vg1 0 logical volume(s) in volume group "vg1" now active ### filter one leg of the raid: global_filter = [ "r|^/dev/sdb2|" ] # systemctl restart lvm2-lvmetad.service # pvscan --cache # vgchange -a y WARNING: Device for PV WzDZS1-Hj9B-RZCa-uhOc-pY9L-1rLN-GB5Zs1 not found or rejected by a filter. Refusing activation of partial LV vg1/Thin. Use '--activationmode partial' to override. 0 logical volume(s) in volume group "vg1" now active -------------------- 8< -------------------- (--activationmode partial works) I am using lvm2-2.02.171-8.el7.x86_64. Cheers, --leo -- e-mail ::: Leo.Bergolth (at) wu.ac.at fax ::: +43-1-31336-906050 location ::: IT-Services | Vienna University of Economics | Austria _______________________________________________ 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/