Hi! As the raid1 check of my two-drive LV recently reported a mismatch count > 0, I did some forensics. One experiment was to create a snapshot of one leg of the mirror and try to mount the snapshot. This worked fine but unfortunately I cannot remove the snapshot now! lvm wants to remove the origin too: -------------------- 8< -------------------- # lvremove vg_test/snap_leg_0 Do you really want to remove active origin logical volume vg_test/testlv_rimage_0 with 1 snapshot(s)? [y/n]: n Logical volume vg_test/testlv_rimage_0 not removed. -------------------- 8< -------------------- (I have added the full history of a test setup below.) Could anyone provide a hint how to get rid of the snapshot? (Maybe manually using dmsetup commands and metadata backup editing?) Thanks, --leo -------------------- snip! -------------------- # lvcreate --type raid1 -m 1 -n testlv -L100m vg_test /dev/vdb /dev/vdc Logical volume "testlv" created. # lvcreate -s -L50m -n snap_leg_0 /dev/mapper/vg_test-testlv_rimage_0 Using default stripesize 64.00 KiB. Rounding up size to full physical extent 52.00 MiB Logical volume "snap_leg_0" created. # lvremove vg_test/snap_leg_0 Do you really want to remove active origin logical volume vg_test/testlv_rimage_0 with 1 snapshot(s)? [y/n]: n Logical volume vg_test/testlv_rimage_0 not removed. # lvs -a -o+devices,lv_uuid LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices LV UUID root vg_sys -wi-ao---- 5.00g /dev/vda2(0) fqp4Np-mLyL-y0OS-nufS-0hsT-7ijc-lGD9Za swap vg_sys -wi-ao---- 2.00g /dev/vda2(2048) uNG1ht-eOKQ-y8Ji-yWSU-ZkZS-ZTIe-1M82mW var vg_sys -wi-ao---- 3.00g /dev/vda2(1280) nDwCsP-vn38-6AUb-Dqer-VkLv-QHs3-CfVNCR snap_leg_0 vg_test swi-a-s--- 52.00m [testlv_rimage_0] 0.00 /dev/vdb(26) f5AXqK-lDNe-hNrO-AW7G-yFvl-ctxU-fivKQf testlv vg_test rwi-a-r--- 100.00m 100.00 testlv_rimage_0(0),testlv_rimage_1(0) Av5Y8Z-NBTH-tfN2-hCbW-Sur0-ebGU-SHBlsk [testlv_rimage_0] vg_test owi-aor--- 100.00m /dev/vdb(1) OJyEep-Lgfm-B20o-4rfl-d38O-QByz-8oBa5z [testlv_rimage_1] vg_test iwi-aor--- 100.00m /dev/vdc(1) J4AP4p-Mhfo-4oPn-SOFP-CGAi-riyL-CFr1fk [testlv_rmeta_0] vg_test ewi-aor--- 4.00m /dev/vdb(0) Hgd58x-5Z2C-phkD-cIvl-KbPB-UWPz-THyZ3h [testlv_rmeta_1] vg_test ewi-aor--- 4.00m /dev/vdc(0) mvehrT-Ofci-nWpm-A43m-iBpl-YW1U-Z1Z9x4 # lvremove --select lv_uuid=f5AXqK-lDNe-hNrO-AW7G-yFvl-ctxU-fivKQf Do you really want to remove active origin logical volume vg_test/testlv_rimage_0 with 1 snapshot(s)? [y/n]: n Logical volume vg_test/testlv_rimage_0 not removed. -------------------- snip! -------------------- -- 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/
