mah@wu-wien.ac.at (Michael Haberler) (05/28/91)
I hooked up a HP35450A DAT tape to Xenix 2.3.2GT with an Adaptec 1542B
controller. [hint: doesnt work with Rev.B HP firmware, must be Rev C].
This works, except that on every device close, the tape gets *ejected*
from the drive. Needless to say, this doesnt make it too useful in
a unattended-backup situation.
I've permuted a few Xenix patches, to no avail.
Any clues/minor number magic/kernel patches?
- michael
pls cc me at mah@wu-wien.ac.at. Thanks.
ps: [Roy Neese: I tried mailing to you as neese%adaptex.uucp@uunet.uu.net,
is this wrong? -tnx, michael]
--
Michael Haberler mah@wu-wien.ac.at, mah@awiwuw11.bitnet
University of Economics and Business Administration
A-1090 Vienna, Augasse 2-6 Biz: +43 (1) 31336 x4796 Fax: 347-555
Home: +43 (1) 961-679 (voice & fax) D-Netz: +43 (663) 811-056kev@hpcpbla.HP.COM (Kevin Jones) (05/30/91)
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. ----------------------------------------------------------------- This response does not represent the official position of, or statement by, the Hewlett-Packard Company. The above data is provided for informational purposes only. It is supplied without warranty of any kind.