[linux-lvm] How to stop MERGE? (was Re: more vg problems or oddities...not using dmsetup remove seems to be bad?)
Linda A. Walsh
lvm at tlinx.org
Mon Sep 12 17:27:35 UTC 2011
Stuart D. Gathman wrote:
> In the OP problem, we don't know the exact error message, so perhaps
> the snapshot really was open. In any case, she needs to stop the
> merge from happening the next time the LV is activated.
I've only seen 1 error message ..
Ah....here are the two messages...this ****IS NOT*** a snapshot volume...
it's a static volume!
Here's lvs. I'm going to remove the oldest static 'snap' (not an active
snapshot, but a copy of one that existed back then. It's currently
mounted, .. (lv Home-2011.07.20-13.43.15; you'll never guess when the
snapshot was started or what the base LV was.. ;-) )...
It's currently mounted, and no 's' in status... (i.e. not an active
NOTE, poor 'Home' has 'O' status -- thinks it is MERGing, but nothing
for it to MERGE with! -- this is a problem waiting to happen that I need
LV VG Attr LSize
Backups Backups -wi-ao 10.91t
Home Home+Space Owi-ao 1.00t
Home-2011.07.20-13.43.15 Home+Space -wi-ao 171.00g <-about to remove
Home-2011.07.25-16.24.53 Home+Space -wi-ao 1.88g
Home-2011.08.31-07.34.53 Home+Space -wi-ao 1.86g
Home-2011.09.04-19.25.08 Home+Space swi-ao 1.00t Home 1.25
Home.diff Home+Space -wi-ao 512.00g
# lvremove /dev/Home+Space/Home-2011.07.20-13.43.15 # first w/o
Can't remove open logical volume "Home-2011.07.20-13.43.15"
ok... so lets. unmount it...
# umount /home/snapdir/@GMT-2011.07.20-13.43.15
# lvremove /dev/Home+Space/Home-2011.07.20-13.43.15
Do you really want to remove active logical volume
Home-2011.07.20-13.43.15? [y/n]: y
Logical volume "Home-2011.07.20-13.43.15" successfully removed
This isn't helpful...as it's not *really* active in any way to the OS...
though it might still be 'activated'...(that's why I'm trying to
It was created w/lvcreate, so ... opposite of lvcreate would be
lvremove, no?... there is no 'lvucreate'.. ;-/
FWIW...Home is even more confused...
Thought it was going to merge with a volume from 2011.09.03-xxxx, but
dmsetup remove on /dev/Home+Space/Home-2011.09.03-xxxx suceeded w/o force
as well as:
So now, /Home... what's it going to merge w/? (Garbage likely...)...
That's what I love about the M5 computer, er, LVM2 Merge option:
"No off switch"...
(last crewman who tried to pull the plug got zapped...didn't know lvm
was so dangerous!...;-) ).
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