Offline uncorrectable sectors on hard drive

[Patrick Proniewski]

Hi Michael,

On 4 oct. 09, at 10:50, Michael Fuckner wrote:

>> - is that "Offline uncorrectable sectors" in fact correctable? I've  
>> found howto's for extfs and reiserfs to correct this kind of error  
>> by remapping bad sectors, but nothing for UFS.
>> - this error appears to have disappeared, does it mean the  
>> harddrive (or the fs) made the remapping by it self?
> sector errors are on the hardware, they don't deal with the  
> filesystem.
>
> Perhaps it was a once in a lifetime event, perhaps the drive is  
> going to die really soon.
>
> Please do a smartctl -t long and see if the drive has to be replaced.


here is the result (from `smartctl -l selftest /dev/ad6` after the  
`smartctl -t long /dev/ad6` ):

Warning! SMART Attribute Thresholds Structure error: invalid SMART  
checksum.
=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining   
LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%      
34350         -
# 2  Short offline       Completed without error       00%      
34339         -
# 3  Extended offline    Completed: read failure       20%      
34317         201626851
# 4  Short offline       Completed without error       00%      
34315         -
# 5  Short offline       Completed without error       00%      
34291         -
# 6  Short offline       Completed without error       00%      
34267         -
# 7  Short offline       Completed without error       00%      
34243         -
# 8  Short offline       Completed without error       00%      
34220         -
# 9  Short offline       Completed without error       00%      
34196         -
#10  Short offline       Completed without error       00%      
34172         -
#11  Extended offline    Completed without error       00%      
34150         -
#12  Short offline       Completed without error       00%      
34148         -
#13  Short offline       Completed without error       00%      
34124         -
#14  Short offline       Completed without error       00%      
34100         -
#15  Short offline       Completed without error       00%      
34076         -
#16  Short offline       Completed without error       00%      
34053         -
#17  Short offline       Completed without error       00%      
34029         -
#18  Short offline       Completed without error       00%      
34005         -
#19  Extended offline    Completed without error       00%      
33983         -
#20  Short offline       Completed without error       00%      
33981         -
#21  Short offline       Completed without error       00%      
33957         -

It looks like the error is gone, but may be I'm wrong.

regards,
patpro