I wanted to merge a old snap shot (root_snap10) of my root file system back
into root.
LV VG Attr LSize Pool Origin Data% Meta%
Move Log Cpy%Sync Convert
home_lv kubuntu-vg rwi-aor--- 1000.00g
100.00
root kubuntu-vg owi-aor--- 50.00g
100.00
root_snap10 kubuntu-vg swi-a-s--- 50.00g root 28.42
root_snap14 kubuntu-vg swi-a-s--- 50.00g root 0.00
So I boot from a USB and ensure /dev/kubuntu-vg/root is not mounted and I
issue the lvconvert command below.
And it errors with "Failed query for merging percentage. Aborting merge"
sudo lvconvert --merge /dev/kubuntu-vg/root_snap10
Merging of volume root_snap10 started
root: Failed query for merging percentage. Aborting merge
root_snap10 would appear to be gone.
I can boot to this system and the system does appear to have been restored
to the state it was when the snapshot was taken.
However, if I try snapshot root now
sudo lvcreate -s -n root_snap10b -L 50G /dev/kubuntu-vg/root
Snapshots of an origin that has a merging snapshot is not supported
So the system still thinks /dev/kubuntu-vg/root is in the middle of
merging.
Which worries me - my root file system might be in some half and half state
between two different snapshots
* Is there a way out of this conundrum? *
I do have a snapshot I took just before attempting the merge (root_snap14).
I guess I could try and merge that to root.
I am on kubuntu 16.04
lvm version
LVM version: 2.02.133(2) (2015-10-30)
Library version: 1.02.110 (2015-10-30)
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