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Why does my Raw Read Error Rate increase when I defrag?

post #1 of 5
Thread Starter 
Why?

This has happened on a WD5000BEVT (External, WD Elements SE) and a WD2002FAEX (Internal, 2TB Black on SATA III 6Gbps port, ASRock Z68M-USB3)

Does heat have anything to do with it?
These two drives run at pretty high temperatures. In the 40's - around 42 or so for the 2TB Black and 45's for the 500GB SE.
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post #2 of 5
It's likely more noticeable when you defrag due to the drive shovelling data from here to there. If it's not due to surface defects, then it's likely due to the read/write head being slightly out of alignment. I don't think your issue is heat-related however; hard drive are pretty resilient in that regard.

I have a similar issue with a few of my Samsung F4EGs, a high Raw Read Error Rate - but so far I've had no data recovery issues.
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post #3 of 5
Thread Starter 
Umm, the WD5000BEVT one isn't that bad. I've never dropped it, and it had 10 read errors from a long time ago; which I attributed to wonky USB cable. It went up to 11 during the super-long defrag today, but that's that.

The WD20FAEX though, has a count that increases by 1 or 2 values daily. Today it might be 40, tomorrow 42 or 43.
Never dropped it from a height, but my friend recalls his little cousin running into the table and knocking the computer off its support.

It did experience a hard drop on a hard floor from a height of 2 inches; whilst the computer was powered on.

I'd expect though, that the impact damage would take a larger toll than this; but besides the Raw Read Error Rate, nothing else has changed. There are no pending sectors nor reallocated ones.

Does seem a bit alarming though, that it increases daily.
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2x KVR1333D3N9/2G Plextor M5S 128GB Western Digital Caviar GreenPower WD5000AACS Western Digital Caviar WD2500JS 
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post #4 of 5
Thread Starter 
One more thing as well - why do my external hard drives have an inconsistent power on time?
They sort of... Erase their own history.

Last night I checked a WD1200BEVS in a 'SmartDISK' enclosure, and it had 502 hours on the clock. Bearing in mind that this figure was generated after 16 hours of use yesterday.

This morning, I booted it up to see that the figure is now 486.

How did it backtrack 14 hours on its own!?

EDIT: If anyone has experienced this before, please tell me about your experience and possible workarounds if any.
I know that this doesn't matter in the grand scheme of things (it won't cause a disk to fail) but it is really irksome for one with OCD.

Some may say that this is advantageous should I want to sell the disk - but I don't want to sell it. I want this disk and I need to use it, and it drives me up the wall to see that the disk has just erased 14 hours worth of power on time on its own accord.
Edited by Volvo - 2/18/12 at 5:48pm
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CPUMotherboardGraphicsRAM
Intel Core™ i5 2400 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 6950 Shader Unlocked, @ 900/1400 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveHard Drive
2x KVR1333D3N9/2G Plextor M5S 128GB Western Digital Caviar GreenPower WD5000AACS Western Digital Caviar WD2500JS 
Optical DriveCoolingOSMonitor
LiteON iHAS324 DVD-RW DL Thermaltake Water 2.0 Pro w/ AVC DS12025B12U Windows 7 Home Premium x64 Dell Ultrasharp U2211H 
KeyboardPowerCaseMouse
Rapoo V500 (Kailh Yellow) FSP Aurum AU-400 400W 80PLUS Gold CoolerMaster Silencio 352 CoolerMaster Storm SPAWN 
Audio
Fenda F&D H200 2.0 USB Powered 
CPUMotherboardGraphicsRAM
Intel Core i3 2100 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 5770 1GD5 (Reference) 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveOptical Drive
2x KVR1333D3N9/2G Transcend SSD370 128GB WD Scorpio Blue WD7500BPVT Samsung SH-223C 
CoolingCoolingOSMonitor
Thermaltake Water 3.0 Performer-C AKASA Ball Bearing Windows 7 Home Premium x64 Dell Ultrasharp U2311H 
KeyboardPowerCaseMouse
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CPUMotherboardGraphicsRAM
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RAMHard DriveHard DriveHard Drive
2x KVR1333D3N9/2G Plextor M5S 128GB Western Digital Caviar GreenPower WD5000AACS Western Digital Caviar WD2500JS 
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Rapoo V500 (Kailh Yellow) FSP Aurum AU-400 400W 80PLUS Gold CoolerMaster Silencio 352 CoolerMaster Storm SPAWN 
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CPUMotherboardGraphicsRAM
Intel Core i3 2100 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 5770 1GD5 (Reference) 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveOptical Drive
2x KVR1333D3N9/2G Transcend SSD370 128GB WD Scorpio Blue WD7500BPVT Samsung SH-223C 
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Thermaltake Water 3.0 Performer-C AKASA Ball Bearing Windows 7 Home Premium x64 Dell Ultrasharp U2311H 
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post #5 of 5
Thread Starter 
Le bump
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CPUMotherboardGraphicsRAM
Intel Core™ i5 2400 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 6950 Shader Unlocked, @ 900/1400 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveHard Drive
2x KVR1333D3N9/2G Plextor M5S 128GB Western Digital Caviar GreenPower WD5000AACS Western Digital Caviar WD2500JS 
Optical DriveCoolingOSMonitor
LiteON iHAS324 DVD-RW DL Thermaltake Water 2.0 Pro w/ AVC DS12025B12U Windows 7 Home Premium x64 Dell Ultrasharp U2211H 
KeyboardPowerCaseMouse
Rapoo V500 (Kailh Yellow) FSP Aurum AU-400 400W 80PLUS Gold CoolerMaster Silencio 352 CoolerMaster Storm SPAWN 
Audio
Fenda F&D H200 2.0 USB Powered 
CPUMotherboardGraphicsRAM
Intel Core i3 2100 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 5770 1GD5 (Reference) 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveOptical Drive
2x KVR1333D3N9/2G Transcend SSD370 128GB WD Scorpio Blue WD7500BPVT Samsung SH-223C 
CoolingCoolingOSMonitor
Thermaltake Water 3.0 Performer-C AKASA Ball Bearing Windows 7 Home Premium x64 Dell Ultrasharp U2311H 
KeyboardPowerCaseMouse
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T8
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CPUMotherboardGraphicsRAM
Intel Core™ i5 2400 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 6950 Shader Unlocked, @ 900/1400 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveHard Drive
2x KVR1333D3N9/2G Plextor M5S 128GB Western Digital Caviar GreenPower WD5000AACS Western Digital Caviar WD2500JS 
Optical DriveCoolingOSMonitor
LiteON iHAS324 DVD-RW DL Thermaltake Water 2.0 Pro w/ AVC DS12025B12U Windows 7 Home Premium x64 Dell Ultrasharp U2211H 
KeyboardPowerCaseMouse
Rapoo V500 (Kailh Yellow) FSP Aurum AU-400 400W 80PLUS Gold CoolerMaster Silencio 352 CoolerMaster Storm SPAWN 
Audio
Fenda F&D H200 2.0 USB Powered 
CPUMotherboardGraphicsRAM
Intel Core i3 2100 @ 3.0 ASROCK Z68 Pro 3 M AMD Radeon HD 5770 1GD5 (Reference) 2x KVR1333D3N9/4G 
RAMHard DriveHard DriveOptical Drive
2x KVR1333D3N9/2G Transcend SSD370 128GB WD Scorpio Blue WD7500BPVT Samsung SH-223C 
CoolingCoolingOSMonitor
Thermaltake Water 3.0 Performer-C AKASA Ball Bearing Windows 7 Home Premium x64 Dell Ultrasharp U2311H 
KeyboardPowerCaseMouse
Armaggeddon Strike Eagle MKI-3 (Kailh Red) Dell (Foxconn) F320EM-00 320W 80PLUS Gold CoolerMaster Elite 341 CM Storm SPAWN 
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