I’ve been struggling with this for several days. I started this thread over at hddguru.com if you want some background on some troubleshooting that I’ve tried, but here’s the basics:
Fresh install of Win7 SP1 64 bit to 256GB Samsung 850 Pro
Two 750 GB WD7500AYYS in a RAID 0 controlled by onboard Intel P55 RAID controller
Asus P7P55D-E PRO motherboard
BIOS 1703 (latest from ASUS’ website)
Intel RST 13.2.4.1000
BIOS is set to RAID
DVD drive and 3 TB are also on the Intel SATA ports
The write performance on the RAID is abysmal, rarely breaking 5 MB/s.
<edit, updated screenshot>
Screenshot from ATTO:
https://www.dropbox.com/s/g1pbeahhpausz3…54.30.png?dl=0
What am I missing?
Your latest BIOS has:
RAID oROM: v10.5.0.1034
DEV_ID: 2822
Size: 119KB
Maybe that oROM had issues. For your older 5-series systems, I suggest you try the very good performing v11.2.0.1527 oROM & v11.2.0.1006 driver combo. The v11.2.0.1527 oROM has the same size as your current one (119KB) so you should’t have any issues replacing it. Follow the non-UEFI modding guide that Fernando has written on how to replace your older RAID oROM with the newer v11.2.0.1527 one. Afterwards, uninstall your current drivers, reboot, install v11.2.0.1006 package and reboot. Try to see your RAID performance now.
Thanks, I’ll give that a shot. I’ve been reading carefully through the guide, but not sure where to find the 11.2.0.1006 driver. I found and downloaded the v11.2.0.1527 oROM, but didn’t see any links for drivers, or maybe I’m misinterpreting something.
Just for my own information, is this referring to Intel RST v11.2.0.1006?
The RAID oROM v11.2.0.1527 can be found here: AHCI & RAID ROM Modules
The RST driver v11.2.0.1006 can be found here: Intel(R) RST/RSTe Drivers (newest: v13.5.0.1056/v4.1.0.1046 WHQL)
RAID oROM and driver are now running at the versions noted. Still the same behavior. Any other ideas? After all the work I’ve gone through, I’m beginning to wonder if there is a problem with one or both of the RAID drives themselves?
It could be a problem with the drives or with an operating system setting. I’m not an expert on AHCI/RAID so I’d wait for Fernando’s help. He’s on vacation now.
Did you check the smart status of the RAID0 disks? CrystalDislInfo (http://crystalmark.info/redirect.php?pro…stalDiskInfoX64) can show this for disks that are part of a raid system.
Update:
I broke the RAID apart and ran SMART and ATTO read/write tests on each disk, with the results below. One of the drives has a clean SMART report, but mimics the poor write performance of the RAID:
Good WD7500AYYS disk:
ATTO report:
https://www.dropbox.com/s/w8g28mx44bv78c…29.50.png?dl=0
SMART report:
https://www.dropbox.com/s/jeubvhrzc23jm2…55.48.png?dl=0
Bad WD7500AYYS disk:
ATTO report:
https://www.dropbox.com/s/03781h7vznkqyb…00.28.png?dl=0
SMART report:
https://www.dropbox.com/s/lcdc17sa1ygkoh…54.12.png?dl=0
The ATTO results from the bad disk look just like the results when they were RAIDed together, so it’s definitely holding things back.
Recommendations on what I should try before replacing the bad drive? CHKDSK, or something else?
Well, running CHKDSK marks the bad sectors as unusable, which would help for the moment. You could also run the WD Data Lifeguard Diagnostic Tool, which can be found here: http://support.wdc.com/product/download…0&sid=3&lang=en
But having this Reallocated Error means, this drive is slowly dying. I would replace it at soon as possible.
Solved! Bought two new 1 GB WD Reds and did a RAID 0 on 'em. MUCH better write performance. Thanks for all the input, I learned a lot. Happy Holidays to all.
https://www.dropbox.com/s/2flwpfia3182dg…20.47.png?dl=0