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Slow RAID 5 transfers

D

dgafin

Weaksauce
Joined
Nov 6, 2007
Messages
92
I'm running a Supermicro X7SBE with an onboard Intel ICH8R/9R/10R RAID controller with volume write-back cache enabled. I previously was running 3x640GB WD Caviar Black drives in RAID 5 flawlessly, with no issues. I recently added a fourth 640GB drive and deleted the entire array and recreated it. I installed Windows Server 2008 x64 (which I had before) and tried transferring files back to the array from another server and it was extremely slow. The transfer will start out at 60MB/s+ and then just slow to a crawl. The server is nearly unresponsive when transferring any large files. It's even to the point where I can't transfer a folder under 1GB without it slowing to a crawl. I have 8GB of memory, and don't know if the last drive I added is bad or what. Any suggestions?


EDIT: From what I can tell it's probably a firmware issue. The new drive, although the same model, has different firmware which I think is causing the RAID dropouts. Now I just need to contact WD and figure out if I can update this or somehow get a drive with the same firmware...could be interesting. Any input is appreciated.
 
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