Drive mirroring - opinion wanted

[dsr-mzpnVDyJpH4k7aNtvndDlA at public.gmane.org (Dan Ritter)]

On Sat, Jun 06, 2009 at 08:38:02AM -0400, Jerry Feldman wrote:
> recently, I acquired a 1TB SATA drive for home as an addition to my 
> existing 160GB drive. Obviously, the proper way to set things up are to 
> have 2 identical drives. I do back up my system daily to a USB drive, 
> but I would just like some recommendations before I move to Fedora 11.
> I do have enough space on a USB drive to back up everything important 
> (such as /home, and my virtual machines) so I can do a complete reformat 
> if necessary.
> But, what I would like to do is to continue to use my 160GB as my 
> primary drive (currently set up as LVM), and install fedora 11 onto the 
> new drive. I currently have 1 137G volume group on the 160 GB drive. Can 
> I simply allocate a 137GB volume group on the 1TB drive to use as a 
> mirror for the 137VG on the 160.
> 
> Or, would I be better off starting from scratch when I install Fedora 
> 11, use the 1TB drive as the boot drive and set up multiple volume 
> groups, or simply just rely on my existing daily backups.

You could do any of these things, but you might be happiest
allocating 200GB or so of the new disk as a filesystem to use as
a repository for rsnapshot. rsnapshot can provide you with
multiple revisions of whatever happens on your 137GB volume, in
an easier-to-access form than LVM's snapshotting capabilities.

-dsr-


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