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Raid array keeps degrading

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May 22, 2011 9:44:05 PM

Can I change the drive time-out setting in software or do I have to do it in the raid controller menu?

More about : raid array degrading

May 22, 2011 9:46:04 PM

EVGA P55 FTW mobo
intel raid controller of some sort
intel raid software
3x 2 TB WD Green drives in a RAID 5 array
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May 22, 2011 10:24:54 PM

srones said:
EVGA P55 FTW mobo
intel raid controller of some sort
intel raid software
3x 2 TB WD Green drives in a RAID 5 array


WD does not recommend use of their "green drives" in RAID arrays. For more information consult their website for the proper drives to use in RAID arrays.
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Related resources
May 22, 2011 10:39:24 PM

srones said:
EVGA P55 FTW mobo
intel raid controller of some sort
intel raid software
3x 2 TB WD Green drives in a RAID 5 array


I found the WD webpage about RAID drives:

http://wdc.custhelp.com/app/answers/detail/a_id/1397/p/...

"Difference between Desktop edition and RAID (Enterprise) edition drives:

If you install and use a desktop edition hard drive connected to a RAID controller, the drive may not work correctly. This is caused by the normal error recovery procedure that a desktop edition hard drive uses.

Note: There are a few cases where the manufacturer of the RAID controller have designed their cards to work with specific model Desktop drives. If this is the case you would need to contact the manufacturer of that controller for any support on that drive while it is used in a RAID environment.

When an error is found on a desktop edition hard drive, the drive will enter into a deep recovery cycle to attempt to repair the error, recover the data from the problematic area, and then reallocate a dedicated area to replace the problematic area. This process can take up to 2 minutes depending on the severity of the issue. Most RAID controllers allow a very short amount of time for a hard drive to recover from an error. If a hard drive takes too long to complete this process, the drive will be dropped from the RAID array. Most RAID controllers allow from 7 to 15 seconds for error recovery before dropping a hard drive from an array. Western Digital does not recommend installing desktop edition hard drives in an enterprise environment (on a RAID controller).

Western Digital RAID edition hard drives have a feature called TLER (Time Limited Error Recovery) which stops the hard drive from entering into a deep recovery cycle. The hard drive will only spend 7 seconds to attempt to recover. This means that the hard drive will not be dropped from a RAID array. While TLER is designed for RAID environments, a drive with TLER enabled will work with no performance decrease when used in non-RAID environments.
Western Digital manufactures desktop edition hard drives and RAID Edition hard drives. Each type of hard drive is designed to work specifically as a stand-alone drive, or in a multi-drive RAID environment."

































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a c 99 G Storage
May 23, 2011 4:19:13 PM

I never had issues with Seagate Barracuda 7200.10 500GB in RAID 0, nor with either my Samsung SpinPoint F3 1TB or Samsung SpinPoint F4 2TB in RAID 0. Knocking on wood.

Samsung does sell a RAID approved version of the F3, called F3R, for $20.00 more than a standard F3.

I've read alot of threads about WD in RAID and there troubles, so you are not alone. I'm sure they have there own RAID approved drives, but at a cost. They are called WD RE3 drives, 1TB for $140.00.
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May 26, 2011 2:41:16 AM

Ah, yes. Since I started using my Adaptec RAID 2405, I won't buy another drive unless it works in a RAID array. It's a shame they don't put that on their web site so that you can actually know what you are getting into. Really, there should be a jumper for TLER on every drive they sell.

All that said though, looks like your drive is actually bad. That happens. Get some RE4's IMO.
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