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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!agate!overload.lbl.gov!lll-winken.llnl.gov!koriel!ames!sgi!fido.asd.sgi.com!gazette.esd.sgi.com!anchor.esd.sgi.com!olson From: olson@anchor.esd.sgi.com (Dave Olson) Newsgroups: comp.os.386bsd.questions Subject: Re: Reading 8mm tape under FreeBSD 1.0.2 Date: 16 May 1994 05:00:29 GMT Organization: Silicon Graphics, Inc. Mountain View, CA Lines: 19 Message-ID: <2r6uld$4v3@gazette.esd.sgi.com> References: <1994May10.045408.11205@ticipa.pac.sc.ti.com> <Cpn6o3.IAu@ns1.nodak.edu> NNTP-Posting-Host: anchor.esd.sgi.com In <Cpn6o3.IAu@ns1.nodak.edu> tinguely@plains.NoDak.edu (Mark Tinguely) writes: | This may not answer your question, but we have always see a reboot trash a | mounted 8mm tape on our Sparc machines. I can see tape activity when it is | initialized, I wonder if the unit does some test write that trashes the | data. | It's worse than that. The stupid drive doesn't write the EOD marker after writing to the tape, until some operation that causes reverse tape movement (BSR BSF rewind). If there is either a SCSI bus reset or a power cycling before that, the end of the tape is trash. The hack is to do a BSF/FSF pair after the write filemark after writing to the tape. -- The most beautiful things in the world are | Dave Olson those from which all excess weight has been | Silicon Graphics removed. -Henry Ford | olson@sgi.com