Hi,

On 16.03.2012 12:05, Michael Kuss wrote:
> surely this is the nth question on how to replicate a backup pool.
> However, this time it's from an old 300GB Lacie ethernet disk mini.  I
> tried:
> 1) plain rsync with -H.  This worked last year, I remember it took a week
> or so.  This year, either the LAN is worse, or the disk is aging, I get
> regularly timeouts.
> 2) rsyncing just cpool, and using tarPCCopy for the single backups.  Works,
> but it is very slow, I'm now in the second week, with another week to go.
> And, I had some timeouts also here.  So, I have to rerun some backups for
> sure, and to be prudent I should very anything anyway.
> 3) I tried to find a tool similar to dd which works on cifs mounted NAS and
> just copies the raw device.  I had no success.
> Anybody has any advice on how I could speed this process?    In case it's
> relevant, the disk is formatted xfs.
> Another option is just forget about it, start with a fresh pool, and hope

Two ideas:
  - Take out the disk, plug it directly to your machine via sata. Then 
do the dd/rsync/whatever you want to do. 300GB locally copied don't take 
up that long.
  - Start a new backuppc-installation where you copy/recreate your setup 
with new bigger disks. Check that all works the same as the old install. 
Let them run in parallel for some days. Stop the backups on the old 
backuppc-install but do not delete it. You can still access the backups 
in case you need it. Remove the old installation only when the new 
installation starts to deprecate full backups.

Although it works, I can't really recommend using a distant nas for 
/var/lib/backuppc. It doesn't give you any of the "off site" advantages, 
because its not really off site and its always connected. Unless you 
stop the backuppc-process. But then you don't get the automatic 
backup-scheduling.
Better use an internal disk (mirrored with lvm, raid or drbd) and write 
daily, weekly or monthly archives to a nas. You can then either 
schedules these archives either by cron or by hand. You can even make 
cron check whether the nas is present. So that you or your co-workers 
regularly take the nas to home. Then its off-site... One further step 
would be two nas used every other interval.

Have fun,

Arnold
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