LVM snapshot

[Paul Jakma]

On Thu, 12 Aug 2004, Russell Coker wrote:

> I just tried rebooted that machine.  The LVM setup seems mangled and it
> doesn't boot successfully.

Ah yum. You need to make a copy of the most recent /etc/lvm/archive/ 
lvm config (the lvm tools should archive automatically) and delete 
the snapshop. (just do a diff between that file and the previous 
archived lvm config to see which lines to delete), then vgcfgrestore 
the edited sans-snapshot file.

Though, if your rootfs is on LVM you possibly will have difficulty 
completing above[1].

I think recentish Arjan kernels have dm-mirror support included, 
which removes this problem. However, it seems quite flakey. Eg, 
taking multiple snapshots of same filesystem seems to kill things..

1. A good reason to not put root on LVM - your rootfs is your primary 
rescue partition.. Why would you need LVM for root fs anyway?

regards,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
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