Adaptec 7805 Raid 6 Performance - 4 Drives?
Posted on 2013-06-10
I am trying to understand Raid performance in general.
If I am using Raid 6 it looks like I get:
2x read speed, no write speed gain
However what I am not clear is the baseline for these performance.
Am I correct in assuming that these 2x read gain would be based on the performance of the drive without using RAID
So the read speed is 2x the standard read speed of the drive by itself.
Is that correct - I am assuming that the RAM on the card would also give it an extra boost in performance. Or am I over simplyfing it.
Or would it be the sustained non-cached write speed x 2 for read and write would be the non-cached write speed.
I would be using the SATA - ST4000NM0033 Seagate Constellation ES.3.
So would the read speed be 2x 175 MB/s and the Write speed be 175 MB/s
Max. Sustained Transfer Rate OD (MB/s)