Finding file with bad block

[Larry Jones]

My nightly backup last night produced the following error on the
console:

sd0: sn 8769977: media error: unrecovered read error, recommend rewrite (320 
retries)

So, my root drive is either on its last legs or a gremlin got just that
sector.  I was planning to replace it pretty soon, I'll just have to
expedite that process.  In the meantime, however, how do I find out what
file contains sector 8769977 so I know what I need to restore?

-Larry Jones

Why is it you always rip your pants on the day everyone has to
demonstrate a math problem at the chalkboard? -- Calvin