/dev/sda slowly dieing??

[Roger Grosswiler]

Hi,

past days, i had several warnings of my backup, it coudln't read some sectors. Is my harddisc slowly dieing or is this
another issue? Is there a tool within linux, where i can mark some sectors as defective?

Thx
Roger

[Logsnip]
Mar  1 09:18:14 frodo kernel: SCSI error : <1 0 0 0> return code = 0x8000002
Mar  1 09:18:14 frodo kernel: Info fld=0xdbf1c3, Current sda: sense key Medium Error
Mar  1 09:18:14 frodo kernel: Additional sense: Unrecovered read error
Mar  1 09:18:14 frodo kernel: end_request: I/O error, dev sda, sector 14414272
[/Logsnip]