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Damaged WD Caviar Black 640GB WD6402AAEX?

post #1 of 5
Thread Starter 
i bought 2 WD Caviar Black 640GB 2 years ago and set them in RAID 0 and RAID 1, first 100gb of each hdd for 200GB RAID 0 volumen and rest for RAID 1. Never comlained of hdd dropping out of the array, read/write errors or things like that, just the RAID 1 entering in REBUILD mode after power failure or OS freeze due to software problem or something cause it takes long.

After more than 2 years running that config i realized 1 of the HDD lost a little speed and the other seems to be same.
I add some screen caps and i hope someone can help interpretate those graphics and tell me what they mean.

At the begining of the OCT 2013 read test you will see the graphic fell ugly compared to NOV 2011 and its the same in every read test i run now to that hdd. I wonder if its normal or the disk is damaged or if the information shown in the screen caps tells that HDD cant be trusted or something.

People say desktop hdd's are not recommend for RAID but i used that setup cause i read in a Western Digital Caviar Black specification sheet that they were tested and recommended for DESKTOP/CONSUMER raid 0 and 1. Now i see they dont recommend caviar blacks for raids but caviar REDs.

I used ASRock P67 Extreme 4 and Windows 7 HB 64bit

Thanks for your help.thumb.gif






post #2 of 5
Reallocated sector count may indicate that drive is failing. This parameter means that drive was unable to read/write to certain sectors and remapped them to reserved ones.

By itself 3 reallocated sectors are not a problem, but if this value will continue to rise then you should replace hard drive, or at least backup all data.
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My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 4670K Gigabyte GA-Z87X-UD4H  Gigabyte Radeon HD7970 Ghz Edition (GV-R797TO-3GD) Corsair CMX16GX3M2A1600C11 (2 * 8GB DDR3 1600) 
Hard DriveOptical DriveCoolingOS
500GB WD,1.5TB WD, 2 TB WD, 128 Plextor M4 DVD-RW NEC4500A IDE Scythe Mugen 4 Windows 8 Pro 64bit 
MonitorPowerCaseMouse
23" LG IPS236 + 40" Sony LCD Full HD Corsair HX850  Zalman Z9 Logitech G500s 
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post #3 of 5
Thread Starter 
thumb.gif thanks for your reply. What about the OCT 2013 read test graphic falling at the begining? aida64 disk benchmark linear read test shows a big hole in that area falling to 70's MB/s for many minutes then going up to 120's MB/s and keep falling slow till test ends using 64kb sized blocks. Could it be physical damage of somekind? Defective product or its normal after being running that raid setup for 2 years lets say 6 hours daily almost everyday?

Does RAID config affects HDD healths or something?


Edited by HDDnoob507 - 10/30/13 at 11:09pm
post #4 of 5
Prolly. I had around six wd drive fail on me in the last three years. Latest was green 640. Previous ones were the same as yours, dual black 640 in raid. Even though it didn't look so bad in those checks it was still the cause. The rest where downright fails.

Just rma, wd offer great rma service. However I won't be doing business with them again.
post #5 of 5
Thread Starter 
smile.gif.OK, im gonna learn how to RMA. Thanks
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