Peter Walter wrote:
> For me, the matter could be resolved if a 
> way was found to at least backup a backuppc server in a reasonable 
> fashion without requiring particular filesystems and utilities such as 
> zfs send/receive.

But there is a reasonable way: unmount the partition and image-copy the 
raw disk or partition.  Given that the issue with other approaches is 
that the head has to seek all over the place to access the same amount 
of data through the filesystem, this solves the problem neatly with one 
linear pass.  Or, get the same effect by raid-mirroring to your backup 
device so you only have to unmount momentarily to fail/remove the other 
copy.   Zfs improves on this since it has an incremental mode that is 
still based on the block device.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com


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