[linux-lvm] Hot backup for boot/root disk
hacksaw at hacksaw.org
Sat Dec 30 06:19:11 UTC 2006
Toby Bluhm wrote:
> Some people like using LVM for system/OS disks - I don't. So I would
> ditch the LVM and use software raid1. I don't understand why you
> wouldn't want the disks to be constantly in sync. What if they're out of
> sync when a disk dies? However, you could break and rebuild the mirror
> at your whim when using sw raid.
With the scheme where the main data (user dir's and databases) are on
the data disks, the OS shouldn't change very often. The more likely
scenario is that something really dumb has been perpetrated on the OS
disk, and you'd like to be able to recover from that. With continuous
syncing, what you have is two volumes messed up in the same way.
With the data volume, I'd actually have mirror or at least RAID it, and
have snapshots. At least, that the plan.
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