badsect

[Poul-Henning Kamp]

In message <53844.194.225.42.20.1109263952.squirrel at ce.sharif.edu>, falaki at ce.s
harif.edu writes:
>Hello;
>
>I have a hard disk that seems to have some limitted number of bad sectors.
>I want to use badsect to avoid these errors.
>
>   ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=27546816
>   ad0: FAILURE - READ_DMA timed out
>
>I tried this:
>
>   #badsect /mnt/data 27546816
>
>and got:
>
>   block 27546816 out of range of file system
>   don't forget to run fsck ...
>
>What should I do?

You should let your disk deal with it.

Try booting single user and:

	dd if=/dev/ad0 of=/dev/null bs=1m

and see how much damage there actually is.

If there is much damage, you may want to use
	src/tools/tools/recoverdisk
instead

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.