2008-04-18 12:53:15 +0100, Stephane Chazelas: [...] > By bypassing LVM2 and using dmsetup directly, would I > theoretically be able to setup a snapshot outside of LVM2 > managed volume groups, is it worth me trying to dig that way? > Something like: having a LVM (or not) volume group with only > /dev/md0 and creating snapshots of that elsewhere while leaving > the VG containing /dev/md0 undisturbed? [...] [replying to myself] OK, I get it. When one creates a snapshot, he changes the original block device to be a "snapshot-origin" so that every write to the device is forked into: - copying the original block to the snapshot device(s) COW(s) - writing to the original device. So, if I've got the COWs on a failed disk, I suspect this might degrade the performances or even stop the snapshot-origin from working altogether wouldn't it? I'll keep testing... -- Stephane _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
