On 4/2/20 5:19 AM, Wolfgang Denk wrote:
Dear Adam,
In message <d934f662-9fde-370b-bb4b-b92bd1730c96@xxxxxxxxxxxxxxxxxxxxxx> you wrote:
smartctl -x /dev/sdd
...
Model Family: Western Digital RE4
Device Model: WDC WD2003FYYS-02W0B0
Serial Number: WD-WMAY00922575
...
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 23
3 Spin_Up_Time POS--K 253 253 021 - 8583
4 Start_Stop_Count -O--CK 100 100 000 - 77
5 Reallocated_Sector_Ct PO--CK 184 184 140 - 126
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 017 017 000 - 61089
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 67
192 Power-Off_Retract_Count -O--CK 200 200 000 - 48
193 Load_Cycle_Count -O--CK 200 200 000 - 28
194 Temperature_Celsius -O---K 118 105 000 - 34
196 Reallocated_Event_Count -O--CK 095 095 000 - 105
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
197 Current_Pending_Sector -O--CK 200 200 000 - 21
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
198 Offline_Uncorrectable ----CK 200 200 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 200 200 000 - 2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This disk has a pretty high count of reallocated sectors, plus a lot
of other errors. I recommend to replace it ASAP. It is not worth
Concur. Old and worn out. Personally, I replace when reallocations are
in the 10 to 20 range. Once you get past that, they seem to start
coming much faster.
smartctl -x /dev/sdf
...
Model Family: Western Digital RE4
Device Model: WDC WD2003FYYS-02W0B0
Serial Number: WD-WMAY00611922
...
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 0
3 Spin_Up_Time POS--K 253 253 021 - 7350
4 Start_Stop_Count -O--CK 100 100 000 - 73
5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 051 051 000 - 36231
10 Spin_Retry_Count -O--CK 100 253 000 - 0
11 Calibration_Retry_Count -O--CK 100 253 000 - 0
12 Power_Cycle_Count -O--CK 100 100 000 - 64
192 Power-Off_Retract_Count -O--CK 200 200 000 - 46
193 Load_Cycle_Count -O--CK 200 200 000 - 26
194 Temperature_Celsius -O---K 118 094 000 - 34
196 Reallocated_Event_Count -O--CK 200 200 000 - 0
197 Current_Pending_Sector -O--CK 200 200 000 - 0
198 Offline_Uncorrectable ----CK 200 200 000 - 0
199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0
200 Multi_Zone_Error_Rate ---R-- 200 200 000 - 2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...
40 -- 51 0a 00 00 00 2a 25 4e 10 40 00 Error: UNC at LBA =
0x2a254e10 = 707087888
...
40 -- 51 0a 00 00 00 1e 5a 3e 86 40 00 Error: UNC at LBA =
0x1e5a3e86 = 509230726
...
40 -- 51 0a 00 00 00 1e 0c 77 d3 40 00 Error: UNC at LBA =
0x1e0c77d3 = 504133587
...
40 -- 51 0a 00 00 00 1d e4 17 e7 40 00 Error: UNC at LBA =
0x1de417e7 = 501487591
...
40 -- 51 0a 00 00 00 1d c0 73 99 40 00 Error: UNC at LBA =
0x1dc07399 = 499151769
...
40 -- 51 0a 00 00 00 1d 23 fc 01 40 00 Error: UNC at LBA =
0x1d23fc01 = 488897537
This disk also has stored a number of errors, but it does not look
as bad as the first one. However, there are errors. I would
replace it as well.
Disagree. No reallocations by the drive, just bad block log entries.
This drive is fine. The bad block log mis-feature should be turned off
after failing this drive, zeroing its superblock, and adding back to the
array (so the bad blocks get reconstructed).
The bad block log mis-feature should never have been merged in its
current form--it simply prevents redundancy from ever working on problem
sectors, and cannot distinguish correctable communications problems from
true underlying uncorrectable sectors. Which should be left to the
drive, at least until it runs out of spare sectors. (And why would you
keep such a drive anyways?) Bad block logging in MD raid is *Dangerous*
*Junk*.
Best regards,
Wolfgang Denk
Regards,
Phil
