[linux-lvm] snapshot safetynet?
Anselm Kruis
A.Kruis at science-computing.de
Tue Feb 19 02:36:02 UTC 2002
On Tue, 19 Feb 2002, Steve Wray wrote:
> Ok, heres a thought;
> Resizing filesystems is a risky operation,
> by and large, especially shrinking them.
>
> So I had the thought;
> Take a snapshot of the filesystem to shrink,
> use fs tools and lvm tools to shrink it,
> if it goes wrong, restore the snapshot!
I'vd done something similar. I use a patch to enable writes on snapshots.
Once I had to shrink a root filesytem on LVM. I created an writeable
snapshot, rebooted with the snapshot as root filesystem. Thisway the real
root fs wasn't mounted and I could shrink it without problems.
>
> Will it work tho? I'm wondering it lvreduce
> will get confused about the snapshot or if
> the snapshot system will cope with such a huge
> change...
No problem. But I use a patched LVM to allow writeable snapshots.
>
>
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
>
---
Anselm Kruis Tel. +49 (0)89-356386-74
science + computing ag FAX +49 (0)89-356386-37
Ingolstädter Str. 22 mailto: A.Kruis at science-computing.de
D-80807 München WWW: http://www.science-computing.de/
**********************************************************************
*** CeBIT 2002 ***
*** Besuchen Sie uns auf der CeBIT vom 13.-20.03.2002 ***
*** auf dem Messegelände in Hannover, Halle 11 ***
**********************************************************************
More information about the linux-lvm
mailing list