On Oct 1, 2010, at 10:54 AM, Wayne Walker wrote:
> BackupPC uses rsync as a transport.  Does it use any of rsync's smarts
> to prevent downloading unchanged files?  If I run 2 full backups back
> to back, does it pull the entire 90 GB both times?


Make sure to turn on rsync checksum-caching.  It does what you want but may not 
be on by default.   

RAID5 does suck but may or may not be your issue.  Note that 75MB/sec sustained 
writes to large files do not have much relevance to the kind of small random 
i/o that backuppc does.
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