Hello List,
I am using lvm2-2.02.180 on SLES12SP4, I cannot remove the snap LV of root volume, which is based on multipath disk PV.
e.g.
linux-kkay:/ # lvremove /dev/system/snap_root
WARNING: Reading VG system from disk because lvmetad metadata is invalid.
Do you really want to remove active logical volume system/snap_root? [y/n]: y
device-mapper: reload ioctl on (254:3) failed: Invalid argument
Failed to refresh root without snapshot.
But, I can remove the snap LV of data volume successfully, e.g.
linux-kkay:/ # lvremove /dev/system/data_snap
WARNING: Reading VG system from disk because lvmetad metadata is invalid.
Do you really want to remove active logical volume system/data_snap? [y/n]: y
Logical volume "data_snap" successfully removed
If I use the ordinary disk as PV (rather than multipath disk), I cannot encounter this problem (both snap LVs can be removed).
The disk layout is as below,
linux-kkay:/ # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 30G 0 disk
├─sda1 8:1 0 30G 0 part
└─mpd_root 254:0 0 30G 0 mpath
└─mpd_root-part1 254:1 0 30G 0 part
├─system-root-real 254:2 0 10G 0 lvm
│ ├─system-root 254:3 0 10G 0 lvm /
│ └─system-snap_root 254:5 0 10G 0 lvm
├─system-snap_root-cow 254:4 0 5G 0 lvm
│ └─system-snap_root 254:5 0 10G 0 lvm
├─system-swap 254:6 0 2G 0 lvm [SWAP]
├─system-data-real 254:8 0 4G 0 lvm
│ ├─system-data 254:7 0 4G 0 lvm /data
│ └─system-data_snap 254:10 0 4G 0 lvm
└─system-data_snap-cow 254:9 0 840M 0 lvm
└─system-data_snap 254:10 0 4G 0 lvm
sdb 8:16 0 30G 0 disk
├─sdb1 8:17 0 30G 0 part
└─mpd_root 254:0 0 30G 0 mpath
└─mpd_root-part1 254:1 0 30G 0 part
├─system-root-real 254:2 0 10G 0 lvm
│ ├─system-root 254:3 0 10G 0 lvm /
│ └─system-snap_root 254:5 0 10G 0 lvm
├─system-snap_root-cow 254:4 0 5G 0 lvm
│ └─system-snap_root 254:5 0 10G 0 lvm
├─system-swap 254:6 0 2G 0 lvm [SWAP]
├─system-data-real 254:8 0 4G 0 lvm
│ ├─system-data 254:7 0 4G 0 lvm /data
│ └─system-data_snap 254:10 0 4G 0 lvm
└─system-data_snap-cow 254:9 0 840M 0 lvm
└─system-data_snap 254:10 0 4G 0 lvm
Thanks
Gang
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