I have a WDEARS20 drive as my parity drive.  Back in February I got a disk failure.  At that time Joe L. suggested smart report, check cables, etc. which I did and found that the drive was O.k.  Joe suggested that I powercycle the drive and rebuild parity, which I successfully did and it has been working fine until a couple of days ago.  The drive is now doing the same thing.  Smart report is good, cables are good, I powercycled and rebuilt parity, the array comes back up and several hours later the drive fails again.  I have rebuilt it two times now...does anyone have any suggestions?  Syslog attached.

 

Thanks,

Dan

 

Please see my old post that was marked as solved for background:

http://lime-technology.com/forum/index.php?topic=10982.msg104600#msg104600

syslog-2011-05-04.zip

Run a long SMART test on the drive.

If you can test the drive in a Windows PC you could try downloading Western Digital's "Data Lifeguard Diagnostics for Windows".  I recently had a WD20EARS that failed in preclear, the SMART reports were still saying it was good but when I removed it from my unRAID and put it my desktop PC and ran the diagnostics program it reported the drive had too many bad sectors pretty quickly, see this posting:

 

http://lime-technology.com/forum/index.php?topic=12501.msg119078#msg119078

 

Of course the safe thing to do now would be to get a new drive, preclear it a few times, replace the suspect drive with the new drive and then your array will be fully functional and then you can safely test the suspect drive at your leisure.

 

Stephen

 

Thanks everyone.  I purchased a new drive, precleared it and rebuilt parity so I am up and running again.  I pulled the driver and installed it in a windows machine as Stephen suggested.  The WD lifeguard diagnostic indicated that there were errors in the extended test.  I called WD and got an RMA for the drive.

 

Thanks for your help and suggestions.

 

Dan