Date: Fri, 27 Dec 1996 16:22:20 -0500 (EST) From: Peter Dufault <dufault@hda.com> To: julian@whistle.com (Julian Elischer) Cc: freebsd-scsi@freebsd.org Subject: Re: Explain this you SCSI tape experts! :-) Message-ID: <199612272122.QAA10111@hda.hda.com> In-Reply-To: <32C4181D.167EB0E7@whistle.com> from Julian Elischer at "Dec 27, 96 10:40:29 am"
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> > I've seen people use /dev/rst0 instead of nrst0 and then every 'close' > rewinds the device. > If the s/w does a write data/close/open/write EOF/write EOF/close > sequence on rst0 it will result in the 2xEOF (== EOM) being at > the front of the tape. The tape will then return BLANK CHECK > if you try read past that. We were coincidentally discussing the following scenario in the office recently - we think it has happened (but not on FreeBSD): Something resets the SCSI bus. The tape drive rewinds. The tape driver returns EIO. The application detects the write failure and closes the tape to save as much as it can, and the tape now looks blank. -- Peter Dufault (dufault@hda.com) Realtime Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936
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