I have recently acquired an Intel SASMF8I raid card for my office. I have 5 x 1TB disks and have created two arrays, 3 x 1TB RAID-5 and 2 x 1TB RAID-1. The second drive is for sensitive/vital data and the RAID is for temporary and desired but not vital data. I chose this set-up because it maximises my current space on 5 disks without having to buy an extra one for RAID-10, I plan to use the other 3 ports for RAID-1 for performance.
My question is, Why am I seeing no Read Speed advantage on my RAID-5? I know RAID-5 is the most complex controller, and that speed/s are dependant on controller design, but I should see a boost in read speeds over just a single hard drive?
1TB WD10EARX, Avg. 98.0MB/s at 14.ms.
3x1TB SASMF8I RAID-5, Avg. 83.1MB/s at 15.1ms.
EDIT: The above tests were done using HD Tune, I had closed down all running programs, and of course neither of them were the system disk. I know it probably isn't the best program to use, but the same tests were run (with a 36hr initialise in between).
I have read the manual, I have configured the drive/s and checked the configuration. The card itself is plugged into a PCIex16 port (the card is PCIex8). The RAID-5 has sync'd/initialized and I have checked everything in the RAID Console application. I cannot think of anything else restricting the performance.
Any pointers as to the read speeds above? This is a hardware implementation and although the throughput can't be theoretically projected, I should see an increase in read (and maybe write/s too, though not as much) performance, shouldn't I?
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