I purchased a Dell PERC 6/i which I expected to be able to read with 1000 Mbps. There is not much to do now, but there are some things I wanted knowledge about for another time.
I have configured it with four 2 TByte drives and RAID 6.
It has 256 MByte of RAM and transfer rate of 300 Mbps.
The benchmark test showed:
Min read rate: 136.3 Mbps Max read rate: 329,6 Mbps Avg read rate: 242,2 Mbps
What could I had done to get at least 1000 Mbps?
Is it normal for internal and external RAID controllers to have a lower transfer rate eg. 300 Mbps? (I did not noticed at the time that it was not 3 Gbps)
How would a RAID 10 had performed compared to RAID 6 or 5?
Would it have been better to use software RAID (Linux) with the internal 3 Gbps SATA controller?
The drives is SATA III 6 Gbps.
I was asked what I had expected as transfer rate. I will put my answer here, although it is irrelevant. I did not ask about the speed could be correct or what I had expected.
I have calculated the numbers with a loss of 1/3.
Example 4 x 3 Gbps (SATA II. Total 12 Gbps) will provide 8 Gbps.
So what should I have done to get the 1000 Mbps or .... bump?
Screenshot of the benchmark test:
But it seems that the fault is in the switch.
Screenshot of the network test (