[CentOS] LVM Snapshots -broken ? Ever worked ?
bards1888 at gmail.com
Thu Mar 16 12:19:46 UTC 2006
>I've upgraded my x86_64 4.2 box to the latest kernel 126.96.36.199 and tried
>an lvm snapshot. It worked fine and I was able to mount the snapshot
>etc. Now I cannot seem to remove the snapshot. If I try a 'lvremove'
>it asks if I want to remove the 'active' snapshot, if I say yes it just
>hangs and the box goes to 99% wait io, however the disk lights do not
>come on during this. The lvremove process is not straceable so I've got
>no idea whats going on with it.
>Luckily I chose to snapshot /tmp so it is not a show stopper. What I
>did to get around it was to comment out my tmp lv from fstab and just
>allow /tmp to be part of the root filesystem on the root lv. I
>deliberately filled up the snapshot so that it was marked inactive but
>it still thinks it is active when I run the lvremove command again. I
>also tried to lvremove the tmp lv, not the snapshot, and it said it
>couldnt remove the lv while there was a snapshot.
>I found a thread on the forums where Karanbir Singh states that this
>sort of thing was broken in early 4 series but may work in 4.3.
>Does anyone know how I can clean this up ?
>CentOS mailing list
>CentOS at centos.org
Ok, for the record, I was able to remove the snapshot when I booted from
a system rescue CD (http://www.sysresccd.org/), it came up with the vgs
disable and I was able to remove the old snapshot.
I will not be trying snapshots again in a hurry !
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