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From: jac@zabriskie.berkeley.edu (Gordon Jacobs)
Newsgroups: comp.sys.dec
Subject: Dump program on DS3100
Summary: Dump to Files
Keywords: dump,DS3100
Message-ID: <25360@pasteur.Berkeley.EDU>
Date: 1 Jun 90 15:54:10 GMT
Sender: news@pasteur.Berkeley.EDU
Reply-To: jac@zabriskie.berkeley.edu.UUCP (Gordon Jacobs)
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Organization: U.C. Berkeley -- ERL
Lines: 24


    I have set up automatic nightly lev 9 dumps to a certain partition
on my DECstation 3100 system using the commands:

	rm -f /dump/filename
	/bin/dump 9f /dump/filename /partition >& /dump/dump.log

The program faithfull executes but sometimes the file written 
has a size that varies drastically from the amount of
information read.  For example, in the log, the output of dump will be

DUMP: Estimated 15360 bytes output to file named /dump/tools/tools.lev9.Fri
DUMP: Dumping (Pass III) [directories]
DUMP: Dumping (Pass IV) [regular files]
DUMP: 4461568 bytes were dumped to file /dump/tools/tools.lev9.Fri
DUMP: Dump is done

Trying to read the file with restore -if causes a segmentation violation.
This does not happen all the time, but it will occurr reliably after
a certain tape dump at a lower level.

Any ideas what is wrong?
Thanks a lot,
Gordon Jacobs