Hi,
I'm running a daily backup job using something like
rsync -avR --delete "${home}" "${target}/" --link-dest="${targetRoot}last/"
which syncs 800GB from a Raid5 to an internal backup drive.
Once a month I run the same script that takes another backup for same Raid5 to an external drive connected via eSata.
The daily backup takes 6 minutes (not a lot of changes every day), but the monthly backup to eSata takes several hours (99,9% of the files still are unchanged).
I checked the read/write speed of the disks - they are almost identically, so it should be some issue on how I use rsync.
Any ideas?
Mark.