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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!uunet.ca!imax!dave
- From: dave@imax.imax.com (Dave Martindale)
- Subject: Re: More Exabyte 8500c (and SCSI) questions/woes
- Message-ID: <1992Dec15.135948.698@imax.imax.com>
- Organization: Imax Corporation, Mississauga Canada
- References: <1992Nov19.201853.28678@ncsu.edu> <1992Nov20.015438.28686@magnus.acs.ohio-state.edu>
- Date: Tue, 15 Dec 1992 13:59:48 GMT
- Lines: 27
-
- 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?
-
- I ask because I do have an 8500, but I don't have the 8500MON program,
- or the special cable, or even a PC. The 8500 is currently on a Sun,
- but someday I'll want to connect it to one of our Indigos.
-
- Dave
-