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From: ESMP09@SLACTWGM.BITNET.UUCP
Newsgroups: mod.computers.vax
Subject: From disk LBN to filename?
Message-ID: <8605141639.AA16894@ucbvax.Berkeley.EDU>
Date: Wed, 14-May-86 01:19:00 EDT
Article-I.D.: ucbvax.8605141639.AA16894
Posted: Wed May 14 01:19:00 1986
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Need a disk cross reference (LBN to disk filename)
--------------------------------------------------

  Does anyone have a program which can tell me which disk file contains
a specified disk block?  (VMS 4.2, Files-11 Structure Level 2.)  Why do I
ask?  Our RP07 has a soft error on a particular disk block, an error which
is dutifully logged hundreds of times per day.  ANALYZE/ERROR
reveals the identity of the block (cylinder, track, and sector--
which I can convert to a logical block number), but of course
does not reveal the identity of the file which contains the block.
ANALYZE/DISK/READ_CHECK does not report the problem (perhaps the block does
not always get an error, or perhaps /READ_CHECK does not report soft
errors?).  The official recommendation from DEC:  backup disk /
run BAD / restore disk.  [Thanks, but no thanks.]  No doubt I could write
a procedure to read thru the index file to find the file which contains
this errant block--but I'm not proud, I'm willing (even anxious) to
reap the benefits of someone else's efforts.

Thanks in advance,
  Ed Miller
  ESMP09@SLACTWGM.BITNET