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Learning RAID Faultage Downtime on Capacity

T

Tamago808

Junior Member
I'm in the process of tinkering and planning out a future home file server. I'm wondering about the downtime if the RAID Volume faulted in RAID 5 or 6 under certain configurations that the rebuild to bring back up the volume again to continue service. Now the possible configurations are, lets say 4x 1TB vs 7(8)x 500GB in RAID 5. Maybe add two more 1TB for a RAID 6 solution for total of 6x 1TB. Would having bigger capacity sized HDs and a lesser amount of active HDs on the array be faster or slower then having smaller capacity sized HDs and higher amount of active HDs?

Of course, I know it can vary from RAID Controller to RAID Controller but what would your assumptions be?

 
It vastly depends. It took me about 6 hours to rebuild a RAID 5EE (RAID 5 + Hot Swap drive) on an Adaptec 31205 RAID card with 8x Samsung F1 750GB HDs. But then again, it took me about 2 hours to do it on a RAID 1 via Intel Matrix RAID on 2x Seagate 7200.10 160GB HDs.
 
Smaller capacity hard drives with a higher amount of hard drives should rebuild quicker on a apples to apples comparison.
 
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