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From: kev@hpcpbla.HP.COM (Kevin Jones)
Newsgroups: comp.periphs.scsi
Subject: Re: SCSI Dat drive ejects on device close
Message-ID: <9850024@hpcpbla.HP.COM>
Date: 30 May 91 06:57:24 GMT
References: <1991May28.142411.10355@swdsrv.edvz.univie.ac.at>
Organization: HP Computer Peripherals Bristol, UK
Lines: 26

Sounds like the Xenix driver is sending a SCSI "UNLOAD" command on
a device close. This will cause the tape to eject.

This is standard behaviour on HP DAT drives (+ a number of other
manufacturers DAT drives).

There are 2 ways the driver could avoid the unwanted tape eject:
1. Don't send an UNLOAD command, it's not neccesary.
2. Send a SCSI "PREVENT MEDIUM REMOVAL" command prior to sending the
   UNLOAD. The UNLOAD will no longer cause the drive to eject tape.
   (This also disables the eject button)


-----------------------------------------------------------------
Kevin Jones.                       | Hewlett Packard Ltd,
                                   | Computer Peripherals Bristol,
kev%hpcpbla@hplb.hpl.hp.com        | Filton Road,
                                   | Stoke Gifford,
Tel: 011 44 272 799910 (ext 22351) | Bristol.   BS12 6QZ.
                                   | ENGLAND.
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