Can't back-up, compact, or rebuild - why?

A

Andy

Havne't backed-up in a couple of months. Large Entourage 2004
database, running 10.4.3.
When I try to copy the database file OR compact/rebuild it, after a
minute or two I it stops the copy or compacting routine, and I get a
message "I/O error." Prior to the error I hear a loud disk buzz,
repetitive.

I verified the disk with Disk Utility, no problems shown there.

Ideas?

Thanks,

Andy
 
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