Sometime in August I purchased an external Q5 5 hardware raid for to use for my editing, storing media and stock footage. It supports esata and USB 3. I then purchased 5 Samsung 2TB HDD (model HD204UI) to use in this raid array. I hooked this up to my workstation via the esata connection which is on my silicon image host card (Sil 3132 Sata link Controller). However I tested the read and right speed and noticed that somehow limited to around 80MB/s, when its suppose to hit up to 220 MB/s. In trying to get maximum perfomance I used an esata backplate which was connected directly to my motherboard an the transfer speed cahnges to the average expected.
A months down the line when I switched on my system to get started with my work, the driver was not accessible, prompting to format it, saying that windows does not recognise the file format. I had no option but to format it at an extra cost of losing all the date which was on that RAID array (RAID 3 8TB), mostly tapes which needed recapturing. Then the same problem happenned again and the supplier advised me to use RAID 5 saying that most of their clients use RAID 5 and have sold lots of these units without any problems at all. We also verified that my Samsung HDDs did not need the firmware update since they were dated 2011.06. I did switch to RAID 5 and a few days after this incident I was cleaning my Media Cache with After Effects and AE started pointing to corrupted files on that RAID array, and some of the folders became unaccessible. At this point I advised the supplier and had to RMA the unit for further test.
However after over 3 weeks of testing the supplier told me this "The issue you are seeing may be down to your environment and due to each set up being unique to each environment we are unable to test this" and they did not find any fault with the unit and returned it back. So I do not know the problem here I have got the unit with me here and don't understand why that problem is happenning.
- Firstly to reset this unit I will have to use the USB cable that was supplied with it, as the esata connection will not help at all.
- The Silicon (Sil 3132 Sata link Controller) appears to limit my external RAID controllers to just 80MB/s as compared to single HDDs which can hit up to 110MB/s via the same connection. Previous TB 32 Raid array was also limited to 80MB/s.
- I have got two internal Western Digital 7200rpm in software raid and the speed is around 160MB/s, but when they used Areca 1110 hardware Raid they were also limited to 80MB/s.
- When I use HD Tach it only recognise 1404GB via ESATA, but USB 2 sees 8000GB (Correct capacity).
I am thinking of getting a USB 3 host card, but still the reviews on the internet are not quite favourable. The question here is, Is there anything wrong with my hardware and software set up at all, which is bringing me these problem or its ESATA drives with the HP workstation? If anyone could help, how can I overcome this problem?
HP XW 6600
Win 7 Pro 64 bit
Dual Xeon 5450 @ 3.Ghz
32 GB RAM
GTX 285 2GB GPU
Momentus XT (500GB) C drive
Matrox RT X2
Intel RAID 3TB partitioned (2TB + 1TB)