I have a lv, vmzone/desktop that I use as drive for a kvm guest;
nothing special here. I wanted to restore its snapshot so like I have
done many times before I shut guest down and then
lvconvert --merge vmzone/desktop_snap_20170921
Logical volume vmzone/desktop is used by another device.
Can't merge over open origin volume.
Merging of snapshot vmzone/desktop_snap_20170921 will occur on next activation
of vmzone/desktop.
What is it really trying to tell me? How to find out which other
device is using it?
lvdisplay tells me that
lvdisplay /dev/vmzone/desktop
--- Logical volume ---
LV Path /dev/vmzone/desktop
LV Name desktop
VG Name vmzone
LV UUID 3hcB1L-rIRf-PHZQ-I55F-ZXhT-SnSZ-vThO8U
LV Write Access read/write
LV Creation host, time duocismj01e9se, 2017-06-29 15:07:12 -0400
LV snapshot status source of
desktop_snap_20170921 [active]
LV Status available
# open 2
LV Size 100.00 GiB
Current LE 25600
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:6
When I do plain old lvs (or lvs -a -o +devices), the attribute entry
for the desktop looks like
desktop vmzone Owi-aos--- 100.00g
According to https://linux.die.net/man/8/lvs the "O" in Owi-aos--- means it
is merging a snapshot. But, what is its status? Based on how long it
has been that way, I think it is hung but I do not know what is
causing this hangup.
Suggestions?
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