Need some help ....
The local PC shop had a special on Seagate 3TB drives, so I thought I would add a raid 5 cluster (4 + spare) on the 6GB sata ports of my GA-890FXA-UD5 (rev. 2.1) ... I have my OS (Server 2008 R2) is on the JMicron configured as raid 0 ... so my question is strickly related to the SB850 6GB sata ports
I plugged the 3TB drives into the SB850 sata ports, no problem, all 5 drives showed up in windows disk manager ... configured them as soft raid 5, checked alignment and benchmarked. Really, really bad performance results. So I reconfigured as Raid 0 & 1, benchmarked each and ran much better at +300MB/s xfer… but when I when back to raid 5 …. really slow results ???
So next I tried hardware raid through the SB850, the controller recognized the drives, I created the raid 5 cluster and initialized, checked the status … 12Tb cluster. But when I boot into the OS, Windows disk manager still sees the 5 drives as individual drives in raw state. I swapped the drives with a bunch of old 320Gb, configured as raid on the SB850, booted into Windows and disk manager shows as one drive ... so why do the 320 GB work, but not the 3TB drives ???? ( I normally run a raid 10 with 4 - 1Tb on the 6GB interfaces with no problem )
Is the lack of EFI support in the ver 2.1 bios (F6) causing this ?
I tried the F7e BIOS, but during boot, the screen for the JMicron raid is accessible, but NOT the SB850 raid, You can just see the first line of text (less than ~300 ms) appear of the raid detection from the SB controller and the it jumps directly to loading OS … so back to F6 bios
Any other solution in these 404 pages that I missed ?
***** UPDATE *****
Issue resolved, after updating the AMD Raid driver (hardware) to current level available, enabled hardware raid controller in Bios (but NOT defining a Raid cluster, not defining the drives as raid), and using AMD's RaidXpert to build the raid cluster, all is working properly :-)
While the write speed is not as fast as a single drive or Raid 0, it does test at an average of ~100MB across Raid 5 with 5 X 3TB Seagate drives which for me works good enough for media storage. The read speed averages ~350MB. I even added a spare standby spare and tested failure ... works perfectly.
For those of you complaining about the initial Synchronization time ... 15TB took ~40 hours and rebuild time (switch to spare drive) took ~10 hours with very loss in write/read speed.
Thanks for the suggestions to those who replied and yes, a PCI-E controller would be better. But after spending $$$ on 6 x 3TB drives, I was out of cash
Edited by sneezzer - 9/15/13 at 7:37pm