Uncorrectable sector count 1, pending sectors 0, reallocated 0 on two drives for years - why uncorrectable...
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I have two WD Blue 1TB drives since year 2015, bought new from two different shops, used in two different machines. The disks have different manufacture dates. I haven't yet experienced any issues with them - no slowdowns, no data corruption (although I haven't tested all the files on them, so there's a chance that one of them might be corrupted).
Full non-destructive scanning with Victoria and HD Tune doesn't report anything critical nor warnings. Still, some disk utilities have marked the disks as suspicious because of Uncorrectable Sectors.
Here are the relevant SMART values. Both disks have the same values:
ID Cur Wor Thr RawValues(6) Attribute Name
05 200 200 140 000000000000 Reallocated Sectors Count
C4 200 200 __0 000000000000 Reallocation Event Count
C5 200 200 __0 000000000000 Current Pending Sector Count
C6 200 200 __0 000000000001 Uncorrectable Sector Count
C8 200 200 __0 000000000001 Write Error Rate
As you can see, there have been no sector reallocations and there are no pending sectors.
What does the Uncorrectable Sector Count mean in this case?
If there was an error while writing (as Write Error Rate suggests) and a sector was marked as uncorrectable, why didn't the drives attempt to reallocate the bad sectors? Or does it mean just that an error occurred once (maybe during an abrupt shutdown during a power failure) and then later the same sectors could be written again... but then why call them "uncorrectable" if the situation is normal again?
I have tested the situation after half a year - still the same, nothing gets worse. Still curious, how exactly this situation should be interpreted.
hard-drive smart
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
add a comment |
I have two WD Blue 1TB drives since year 2015, bought new from two different shops, used in two different machines. The disks have different manufacture dates. I haven't yet experienced any issues with them - no slowdowns, no data corruption (although I haven't tested all the files on them, so there's a chance that one of them might be corrupted).
Full non-destructive scanning with Victoria and HD Tune doesn't report anything critical nor warnings. Still, some disk utilities have marked the disks as suspicious because of Uncorrectable Sectors.
Here are the relevant SMART values. Both disks have the same values:
ID Cur Wor Thr RawValues(6) Attribute Name
05 200 200 140 000000000000 Reallocated Sectors Count
C4 200 200 __0 000000000000 Reallocation Event Count
C5 200 200 __0 000000000000 Current Pending Sector Count
C6 200 200 __0 000000000001 Uncorrectable Sector Count
C8 200 200 __0 000000000001 Write Error Rate
As you can see, there have been no sector reallocations and there are no pending sectors.
What does the Uncorrectable Sector Count mean in this case?
If there was an error while writing (as Write Error Rate suggests) and a sector was marked as uncorrectable, why didn't the drives attempt to reallocate the bad sectors? Or does it mean just that an error occurred once (maybe during an abrupt shutdown during a power failure) and then later the same sectors could be written again... but then why call them "uncorrectable" if the situation is normal again?
I have tested the situation after half a year - still the same, nothing gets worse. Still curious, how exactly this situation should be interpreted.
hard-drive smart
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
add a comment |
I have two WD Blue 1TB drives since year 2015, bought new from two different shops, used in two different machines. The disks have different manufacture dates. I haven't yet experienced any issues with them - no slowdowns, no data corruption (although I haven't tested all the files on them, so there's a chance that one of them might be corrupted).
Full non-destructive scanning with Victoria and HD Tune doesn't report anything critical nor warnings. Still, some disk utilities have marked the disks as suspicious because of Uncorrectable Sectors.
Here are the relevant SMART values. Both disks have the same values:
ID Cur Wor Thr RawValues(6) Attribute Name
05 200 200 140 000000000000 Reallocated Sectors Count
C4 200 200 __0 000000000000 Reallocation Event Count
C5 200 200 __0 000000000000 Current Pending Sector Count
C6 200 200 __0 000000000001 Uncorrectable Sector Count
C8 200 200 __0 000000000001 Write Error Rate
As you can see, there have been no sector reallocations and there are no pending sectors.
What does the Uncorrectable Sector Count mean in this case?
If there was an error while writing (as Write Error Rate suggests) and a sector was marked as uncorrectable, why didn't the drives attempt to reallocate the bad sectors? Or does it mean just that an error occurred once (maybe during an abrupt shutdown during a power failure) and then later the same sectors could be written again... but then why call them "uncorrectable" if the situation is normal again?
I have tested the situation after half a year - still the same, nothing gets worse. Still curious, how exactly this situation should be interpreted.
hard-drive smart
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
I have two WD Blue 1TB drives since year 2015, bought new from two different shops, used in two different machines. The disks have different manufacture dates. I haven't yet experienced any issues with them - no slowdowns, no data corruption (although I haven't tested all the files on them, so there's a chance that one of them might be corrupted).
Full non-destructive scanning with Victoria and HD Tune doesn't report anything critical nor warnings. Still, some disk utilities have marked the disks as suspicious because of Uncorrectable Sectors.
Here are the relevant SMART values. Both disks have the same values:
ID Cur Wor Thr RawValues(6) Attribute Name
05 200 200 140 000000000000 Reallocated Sectors Count
C4 200 200 __0 000000000000 Reallocation Event Count
C5 200 200 __0 000000000000 Current Pending Sector Count
C6 200 200 __0 000000000001 Uncorrectable Sector Count
C8 200 200 __0 000000000001 Write Error Rate
As you can see, there have been no sector reallocations and there are no pending sectors.
What does the Uncorrectable Sector Count mean in this case?
If there was an error while writing (as Write Error Rate suggests) and a sector was marked as uncorrectable, why didn't the drives attempt to reallocate the bad sectors? Or does it mean just that an error occurred once (maybe during an abrupt shutdown during a power failure) and then later the same sectors could be written again... but then why call them "uncorrectable" if the situation is normal again?
I have tested the situation after half a year - still the same, nothing gets worse. Still curious, how exactly this situation should be interpreted.
hard-drive smart
hard-drive smart
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
asked Mar 7 at 12:09
JustAMartinJustAMartin
87421019
87421019
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
What does the Uncorrectable Sector Count mean in this case?
Your disk is probably safe, but read on ...
Reported Uncorrectable Errors S.M.A.R.T. parameter indicates a number
of errors that could not be recovered using hardware ECC
(error-correcting code).
Recommendations
Although this parameter is not considered critical by the most
hardware vendors, degradation of this parameter may indicate
electromechanical problems of the disk. Regular backup is recommended.
If no other (critical) parameters report a problem, hardware
replacement is recommended on mission critical systems only.
Source S.M.A.R.T. Attribute: Reported Uncorrectable Errors | Knowledge Base
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
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active
oldest
votes
active
oldest
votes
What does the Uncorrectable Sector Count mean in this case?
Your disk is probably safe, but read on ...
Reported Uncorrectable Errors S.M.A.R.T. parameter indicates a number
of errors that could not be recovered using hardware ECC
(error-correcting code).
Recommendations
Although this parameter is not considered critical by the most
hardware vendors, degradation of this parameter may indicate
electromechanical problems of the disk. Regular backup is recommended.
If no other (critical) parameters report a problem, hardware
replacement is recommended on mission critical systems only.
Source S.M.A.R.T. Attribute: Reported Uncorrectable Errors | Knowledge Base
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
add a comment |
What does the Uncorrectable Sector Count mean in this case?
Your disk is probably safe, but read on ...
Reported Uncorrectable Errors S.M.A.R.T. parameter indicates a number
of errors that could not be recovered using hardware ECC
(error-correcting code).
Recommendations
Although this parameter is not considered critical by the most
hardware vendors, degradation of this parameter may indicate
electromechanical problems of the disk. Regular backup is recommended.
If no other (critical) parameters report a problem, hardware
replacement is recommended on mission critical systems only.
Source S.M.A.R.T. Attribute: Reported Uncorrectable Errors | Knowledge Base
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
add a comment |
What does the Uncorrectable Sector Count mean in this case?
Your disk is probably safe, but read on ...
Reported Uncorrectable Errors S.M.A.R.T. parameter indicates a number
of errors that could not be recovered using hardware ECC
(error-correcting code).
Recommendations
Although this parameter is not considered critical by the most
hardware vendors, degradation of this parameter may indicate
electromechanical problems of the disk. Regular backup is recommended.
If no other (critical) parameters report a problem, hardware
replacement is recommended on mission critical systems only.
Source S.M.A.R.T. Attribute: Reported Uncorrectable Errors | Knowledge Base
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
What does the Uncorrectable Sector Count mean in this case?
Your disk is probably safe, but read on ...
Reported Uncorrectable Errors S.M.A.R.T. parameter indicates a number
of errors that could not be recovered using hardware ECC
(error-correcting code).
Recommendations
Although this parameter is not considered critical by the most
hardware vendors, degradation of this parameter may indicate
electromechanical problems of the disk. Regular backup is recommended.
If no other (critical) parameters report a problem, hardware
replacement is recommended on mission critical systems only.
Source S.M.A.R.T. Attribute: Reported Uncorrectable Errors | Knowledge Base
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
answered Mar 7 at 12:56
DavidPostill♦DavidPostill
108k27235271
108k27235271
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
add a comment |
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
Thanks, so this might mean that the disk failed to correct an error once but then it could not reproduce the problem with the same sector, and so there was no need to reallocate it. I highly suspect it might be related to some nasty power brownouts I had a few years ago when my UPS also died.
– JustAMartin
Mar 7 at 13:06
add a comment |
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