Bad sector removal (hdparm) - How to remove bad sectors?
| F.A.Q.Usuwanie bad sektorów (Hdparm) - Jak usunąć bad sektory?
Example error:
Jan 29 18:19:54 dragon kernel: [66774.973049] end_request: I/O error, dev sdb, sector 1261069669
Check the list of sectors to be transferred and transferred (S.M.A.R.T 5 and 196 - should be equal)
smartctl -a /dev/sdb | grep -i reallocated 5 Reallocated_Sector_Ct 0x0033 151 151 140 Pre-fail Always - 0 196 Reallocated_Event_Count 0x0032 001 001 000 Old_age Always - 0 0 na końcu oznacza że nie ma relokowanych sektorów na dysku.
Checking if the sector is really damaged
$ hdparm –read-sector 1261069669 /dev/sdb: Input/Output error If there is no Input/Output error (reading sector 1261069669: succeeded) means that the sector is undamaged.
Recording of the damaged sector (data will be lost)
hdparm –write-sector 1261069669 /dev/sdb
Confirmation of enrollment
hdparm –write-sector 1261069669 –yes-i-know-what-i-am-doing /dev/sdb
Checking if S.M.A.R.T has moved the bad sectors
$ smartctl -a /dev/sdb | grep -i reallocated
5 Reallocated_Sector_Ct 0×0033 100 100 005 Pre-fail Always - 2 196 Reallocated_Event_Count 0×0032 100 100 000 Old_age Always - 2
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