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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!sun-barr!ames!sgi!fido!zola!zuni!anchor!olson
- From: olson@anchor.esd.sgi.com (Dave Olson)
- Subject: Re: More Exabyte 8500c (and SCSI) questions/woes
- Message-ID: <tktjesk@zuni.esd.sgi.com>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- References: <1992Nov19.201853.28678@ncsu.edu> <1992Nov20.015438.28686@magnus.acs.ohio-state.edu> <1992Dec15.135948.698@imax.imax.com>
- Date: Tue, 15 Dec 92 18:39:25 GMT
- Lines: 33
-
- In <1992Dec15.135948.698@imax.imax.com> dave@imax.imax.com (Dave Martindale) writes:
-
- | hshamans@magnus.acs.ohio-state.edu (Harry T Shamansky) writes:
- | >
- | > The real problem I think you are experiencing is a non-even byte disconnect.
- | > Unix kernels don't like odd byte disconnects! You need to set even byte
- | > (four byte boundaries) for disconnect. I should mention that the string
- | > in the tpsc file
- | >
- | > "\40\4\16\0\200\7"
- | >
- | > represents the values sent during a mode-select SCSI command (15h), in
- | > the "Vendor Unique Parameters Page (PF=1 Format)", where the \4 is the
- | > octal value 4, or the Bit 2 asserted, which is "Disconnect on even byte".
- | >
- | > I do know, however, that you should program your 8500c to have this value
- | > set by default. Use the Exabyte 8500MON program, a PC, and a simple 4
- | > conductor cable to the program port on your 8500c (a very worthwhile
- | > program and cable, and a joy to use [works for 8200, 8500 and 8500c]).
- |
- | If the driver sets the drive to "disconnect on even byte" during
- | initialization, why is it necessary to additionally set that as the
- | default mode in the 8500 firmware?
- |
-
- Because the drive firmware seems to be ignoring it. I've heard this
- complaint about several versions of 8500 firmware. It seems to
- take the monitor settings over the modeselect, which is definitely
- broken.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-