From: Boyd Stephen Smith Jr. on
In <20100202135559.GA5883(a)ra.ncl.ac.uk>, Jon Dowland wrote:
>On Tue, Feb 02, 2010 at 12:19:49PM +0100, Rafał Radecki
>wrote:
>> I plan to install Windows 2008 as a guest. I want to use
>> something like LVM snapshots for backups.
>
>Just to pick up on this point, I would suggest that LVM on
>its own is not an adequate backup solution.

Agreed.

>Used to have a
>non-moving target for some other backup system, fine,

Yes, it is a convenient way to "quiesce" the file system so that you get a
consistent view of it throughout the whole of the backup process.

>but
>you definitely want to have a backup system which stores
>your data somewhere other than the disks in your
>production server.

You backups should be protection against at least: (a) user error, (b) normal
hardware failure, and (c) disaster.

user error: "I deleted something important, can you get it back"
normal hardware failure: "Disk #7 needed to be replaced soon, er, now. SMART
just failed it."
disaster: "The building the server was in burned down / flooded"

Snapshots really only cover (a). Normal RAID really only covers (b).
Layering the two still doesn't address (c).
--
Boyd Stephen Smith Jr. ,= ,-_-. =.
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