James Ward wrote:
> I forgot to mention there are 16 disks in the big array.  So you'd 
> recommend RAID5 or 6?

Your best bet is to set it up and run some benchmarks*.  Anything else 
is just speculation.

For what it's worth, I have a similar setup (Intel Xeon X3320 Quad Core, 
8GB RAM, 16 drives on an Adaptec 51645).  I went with RAID 6 with a hot 
spare for my BackupPC partition and formatted it XFS.

I'm backing up (and expiring) around 50GB of data nightly across ~115 
hosts in a ~10 hour window (backups start at 21:00 and have mostly 
completed by 07:00).

As always, your millage may vary.

Chris

*Good luck finding anything even remotely resembling BackupPC's actual 
work load.  Especially once you have any kind of backup history.


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