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- Newsgroups: comp.sys.next.hardware
- Path: sparky!uunet!stanford.edu!leland.Stanford.EDU!news
- From: m@crito.stanford.edu (M Carling)
- Subject: Re: SCSI/Hard drive questions.
- Message-ID: <1992Aug29.015037.10258@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: DSO, Stanford University
- References: <4ebcDni00WA71HOohT@andrew.cmu.edu>
- Date: Sat, 29 Aug 92 01:50:37 GMT
- Lines: 40
-
- In article <4ebcDni00WA71HOohT@andrew.cmu.edu> da0g+@andrew.cmu.edu (David
- Apfelbaum) writes:
- [explanation of problem deleted]
- >
- > The Questions:
- > After talking with the drive manufacturer extensively, they had the
- > following questions about NeXT SCSI:
- >
- > 1) Does the [SCSI interface] system allow disconnect during write?
- > (ie, Can it disconnect before going into the data phase?)
-
- Yes. Disconnects are allowed on writes as well as reads -- it is up to the
- device to decide when to disconnect. Disconnect messages sent by the
- device must be proceded by a SCSI "Save Data Pointer" message as specified
- by the SCSI spec for xfers that break a data phase into multiple parts.
-
- > 2) What is the burst size that it transfers data at. Does it have a
- set
- > burst size that it tries to transfer [send] blocks [data] at?
-
- There is no set "burst size." Disconnects may occur on arbitrary
- boundaries.
-
- > 3) What is the name of the configuration file to change the mode
- select
- > of the drive?
-
- There isn't one. You need to get the drive properly configured from the
- vendor or configure it yourself. If you know what you're doing, you can
- use the scsitools package from the archive sites to play with the drive's
- Mode Select pages.
-
- M Carling
- Director, Bay Area NeXT Group
- --
- "High tech is potent, precise, and in the end, unbeatable. The truth is,
- it reminds a lot of people of the way I pitch horseshoes. Would you
- believe some of the people? Would you believe our dog? Look, I want to
- give the high-five signal to high tech."
- George Bush, 4/25/89
-