You can run long self-test in smartmontools (-t long). Then you can get
failed sector number from the smartmontools (-l selftest) and then you
can use DD to write zero to the specific sector. Also i am highly
recommending to setup smartd as daemon and to monitor number of
relocated sectors. If they will grow again - then it is a good time to
utilize this disk.
[root@bast:~] # dd of=/dev/null if=/dev/ad2 bs=1m conv=noerror
dd: /dev/ad2: Input/output error
2717+0 records in
2717+0 records out
2848980992 bytes transferred in 127.128503 secs (22410246 bytes/sec)
dd: /dev/ad2: Input/output error
38170+1 records in
38170+1 records out
40025063424 bytes transferred in 1544.671423 secs (25911701 bytes/sec)
[root@bast:~] #
That seems to indicate two problems. Are those the values I should be using
with dd?
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