So I have a Western Digital 2TB WD20EARS "Caviar Green" HDD that managed to fail on me after only ~3 years of use. I had it in a home server machine that I frankenstein'd together, though the machine wasn't subject to heavy traffic or excessive disk I/O. Suddenly it started getting Kernel panics pretty regularly, and I noticed it started to take forever to boot back up. I checked the S.M.A.R.T. status of the drive and found that it had a high reallocated sector count (>1200). Unfortunately, I didn't have a spare drive to keep it regularly backed up to, so I'm now going through the ever-so-fun process of recovering the data off of it that I can.
I'm running safecopy to make an image of the drive, which works in a manner similar to dd_rescue. I'm seeing the output image grow by about 10GB an hour, which is very, very, very slow. About 3Mb/s. At this rate, it'll take me another 4 weeks before this is done copying (I can only run the safecopy for 8 hours each day - while i'm at work).
So Here's my question: Why is this hard drive so slow? It does it regardless of whether I hook it up internally to a computer via a SATA cable or using my USB3 adapter. I can feel the drive vibrating, but it feels like it's not spinning very fast.
Here's the S.M.A.R.T. report from 4 days ago:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 1043
3 Spin_Up_Time 0x0027 253 147 021 Pre-fail Always - 4016
4 Start_Stop_Count 0x0032 094 094 000 Old_age Always - 6468
5 Reallocated_Sector_Ct 0x0033 041 041 140 Pre-fail Always FAILING_NOW 1265
7 Seek_Error_Rate 0x002e 090 008 000 Old_age Always - 201781
9 Power_On_Hours 0x0032 057 057 000 Old_age Always - 31754
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 098 098 000 Old_age Always - 2341
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 172
193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 1426599
194 Temperature_Celsius 0x0022 109 102 000 Old_age Always - 43
196 Reallocated_Event_Count 0x0032 001 001 000 Old_age Always - 1265
197 Current_Pending_Sector 0x0032 196 196 000 Old_age Always - 1448
198 Offline_Uncorrectable 0x0030 200 196 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 117 035 000 Old_age Offline - 16609
And the one from right now:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 1281
3 Spin_Up_Time 0x0027 178 147 021 Pre-fail Always - 8066
4 Start_Stop_Count 0x0032 094 094 000 Old_age Always - 6471
5 Reallocated_Sector_Ct 0x0033 041 041 140 Pre-fail Always FAILING_NOW 1265
7 Seek_Error_Rate 0x002e 099 008 000 Old_age Always - 153810
9 Power_On_Hours 0x0032 057 057 000 Old_age Always - 31778
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 098 098 000 Old_age Always - 2344
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 175
193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 1426599
194 Temperature_Celsius 0x0022 110 102 000 Old_age Always - 42
196 Reallocated_Event_Count 0x0032 001 001 000 Old_age Always - 1265
197 Current_Pending_Sector 0x0032 196 196 000 Old_age Always - 1448
198 Offline_Uncorrectable 0x0030 200 196 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 117 035 000 Old_age Offline - 16609
I have noticed a steady increase in the Spin_Up_Time attribute raw value over the last four days, though the normalized value is is still way above the threshold.
