On May 14 08:11:43, Mik J wrote:
> Hello,
> 
> After my new OpenBSD installation, I'm trying to copy data from my
> backup disk and I have these errors.

[Here is where your exact command should be.
Also, you should include a dmesg with hardware issues.]

> wd0f: uncorrectable data error reading
> fsbn 1671616960 of 1671616896-1671617023)

Your backup disk is broken.

> It happens with different files
> that belong to different directories and it's always the number fsbn
> 1671616960 or sometimes fsbn 1671616896.
> 
> I have in previous messages that
> some sectors should be dead on my hard drive and that I have to do something
> so that they won't be used anymore.

You might be reffering to
http://caoua.org/alex/obsd/badsect.html
but I am not sure if it still applies.

> My first question is that I don't
> understand the term fsbn. 

http://lmgtfy.com/?q=openbsd+fsbn

Also:
http://groups.google.com/group/lucky.openbsd.misc/browse_thread/thread/5baeb67634c10925/6360e75f1d55f045?lnk=st&q=uncorrectable+data+error+reading&rnum=1&pli=1

> How can I check all the disk for other bad sectors ?

dd if=/dev/wrd0c of=/dev/null bs=8m

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