Ok, so I recently ran into problems with a Western Digital WD10EZEX 1TB and hope you can clear some facts to me. Specifically, the disk functioned normally a year or so. I use it as a secondary disk in my build for installed software (no OS), music and videos. A few days ago my system was slow and froze when reading data from this disk. I made a Crystaldisk test and saw a high real value (200ish) in "C5 current pending sector count". I immediately made a back-up and tried Data lifeguard diagnostic from the WD site. All tests gave me errors. HDTune saw the same C5 value as Crystaldisk and a benchmark here gave me read speeds between 0.2 to 6mb/s which is pretty slow. Eventually my Win7 would freeze and/or won't start with the hdd connected.
Next step were some tests under Dos from a bootable flash drive. With the exception of HDSentinel which said the Hdd is 52% healthy not one utility even read the smart, not to mention formatting it. I was able to wipe the disk under Linux based GParted and create 2 NTFS partitions in it. Now Win7 works with it, I get close to normal speed results but the "C5 current pending sector count" keeps changing after each operation on the disk. From hour to hour I get values like 89, 50, 31, 80, 1, 5, 19 etc. I tried again Data Lifeguard Diagnostic from WD with varied results: sometimes it passes the quick test, sometimes not. It never finishes the extended test. I wiped the disk in this app minutes ago and this is what I get from GSmartcontrol:
smartctl 5.43 2012-06-30 r3573 [i686-w64-mingw32-win7(64)-sp1] (sf-5.43-1)
Copyright © 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF INFORMATION SECTION ===
Device Model: WDC WD10EZEX-00RKKA0
LU WWN Device Id: 5 0014ee 0ae0a7a90
Firmware Version: 80.00A80
User Capacity: 1.000.204.886.016 bytes [1,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: 8
ATA Standard is: Exact ATA specification draft version not indicated
Local Time is: Fri Jan 17 17:43:34 2014 GTBST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x84) Offline data collection activity
was suspended by an interrupting command from host.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 121) The previous self-test completed having
the read element of the test failed.
Total time to complete Offline
data collection: (10440) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
Offline surface scan supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 120) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x30b5) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 196 194 051 Pre-fail Always - 7102
3 Spin_Up_Time 0x0027 177 173 021 Pre-fail Always - 2133
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 235
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0
9 Power_On_Hours 0x0032 099 099 000 Old_age Always - 1012
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 222
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 207
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 27
194 Temperature_Celsius 0x0022 098 098 000 Old_age Always - 45
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 196 000 Old_age Always - 20
198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed: read failure 90% 1011 153312512
# 2 Short offline Completed: read failure 90% 1009 142136468
# 3 Short offline Completed: read failure 90% 1009 142136464
# 4 Extended offline Completed: read failure 90% 1005 142136464
# 5 Short offline Completed: read failure 90% 1005 142136468
# 6 Conveyance offline Completed: read failure 90% 1005 142136464
# 7 Short offline Completed without error 00% 1003 -
# 8 Short offline Completed: read failure 90% 1000 6016375
# 9 Short offline Completed: read failure 90% 1000 6016371
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay
I should also mention the reallocation sector count was and is at 0 in all testing apps throughout this ordeal.
I reckon the HDD is a goner, but I would like to know what's happening exactly? Are there any chances I could make it work reliably or not? And to be sure I won't see it back from warranty as is with some bulls**t excuse, what can I do to further its death?
Specs are: MB: ASUS P8Z77-V Deluxe, Proc: Intel i7 3770k, [/size]PSU: OCZ ZS Series 550W, Ram: Corsair 8gb DDR3, SSD: Intel 120gb 330 family.
Edited by hamluis, 17 January 2014 - 07:47 PM.
Removed formatting - Hamluis.