G'day Lukas,
I am partway through testing an Adaptec 5405 and 12xSeagate ES.2 1TB Disk configuration.
But preliminary observations are:
The more disks in a raid, the longer the rebuild time, and therefore the more chance of a total failure if a second drive goes or you have a "Bit Error Failure".
So because of this I would not use anything other than Raid6. It is just too risky that a second error while the Raid5 is rebuilding will result in lost data.
Our rebuild times are:
Raid5 x 3 =10hrs ,Est Throughput=415Mb/s
Raid6 x 4 =10hrs ,Est Throughput=424Mb/s
Raid6 x 5 =9hrs ,Est Throughput=583Mb/s
Raid6 x 5 =11hrs ,Est Throughput=489Mb/s
Raid6 x 6 =10hrs ,Est Throughput=888Mb/s
Raid6 x 11 =17hrs ,Est Throughput=1118Mb/s
Raid60 x 10 =11hrs ,Est Throughput=953Mb/s
Raid10 x 4 =4hrs ,Est Throughput=1016Mb/s
Notes: The "x ??" figure is the number of 1TB drives, and the Est throughput is the Array Size in MB divided by the time to rebuild.
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