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- From: da0g+@andrew.cmu.edu (David Apfelbaum)
- Newsgroups: comp.sys.next.hardware
- Subject: SCSI/Hard drive questions.
- Message-ID: <4ebcDni00WA71HOohT@andrew.cmu.edu>
- Date: 28 Aug 92 11:52:19 GMT
- Article-I.D.: andrew.4ebcDni00WA71HOohT
- Organization: Electrical & Computer Engineering, Carnegie Mellon, Pittsburgh, PA
- Lines: 54
-
-
- I am having some problems with a SCSI harddrive, and I was hoping some
- of you might have some ideas. Or information about the NeXT SCSI
- interface.
-
- The situation:
- Drive is an external 320 Meg. originally designed for use with IBM
- PC's (through a SCSI card). Drive can be seen from the NeXT on the SCSI
- bus. Drive can be low-level formated with 'disk' or 'sdformat'.
- However attempts to do a high-level format (newfs) result in errors:
-
- sd1: Incomplete disk transfer; bytes moved = 0x400, resid = 0x400, retry 1
-
- for [1-9] retries. Obviously something is not kosher. But the drive is
- SCSI-2 with Rev > 17B. Any ideas?
-
-
- 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?)
-
- 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?
-
- 3) What is the name of the configuration file to change the mode select
- of the drive?
-
- I was a bit confused by #3 -- it seems that SCSI drives are configurable
- from the host computer in some manner. But it seems as though this
- would have to be done in ROM, or somewhere early on in the bootstrapping
- proceedure. (/etc/disktab does not seem to be what we/they are after --
- they are interested in lower-level information, like buffer parameters,
- phasing of the drive, and so forth...) Does anyone have any ideas?
-
-
- @begin mild_flame
-
- Yes, I know the correct way to get this information is the call up NeXT,
- shell out $100 bucks, and be told the information. But I can't really
- afford to do that right now... So, I thought I'd try asking here.
-
- One has to wonder just how much business this is costing NeXT. You know
- -- penny wise and dollar dumb!
-
- @end mild_flame
-
-
- Anyway, thank you for your time and help. It is greatly appreciated!
-
- -David
- da0g+@andrew.cmu.edu
-