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- Newsgroups: comp.sys.amiga.hardware
- Path: sparky!uunet!usc!wupost!darwin.sura.net!Sirius.dfn.de!chx400!bernina!wild
- From: wild@nessie.cs.id.ethz.ch (Markus Wild)
- Subject: Re: Questions about A2090 HD controller...
- Message-ID: <1992Sep3.213920.15513@bernina.ethz.ch>
- Sender: news@bernina.ethz.ch (USENET News System)
- Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
- References: <1992Aug24.163923.13683@lonex.rl.af.mil> <37599@sdcc12.ucsd.edu>
- Distribution: usa
- Date: Thu, 3 Sep 1992 21:39:20 GMT
- Lines: 26
-
- In article <37599@sdcc12.ucsd.edu> djohnson@cs.ucsd.edu (Darin Johnson) writes:
- >>I recently purchased a used A2090 SCSI controller for an old A2000.
- >>Also, how would one Low-Level format this drive?
- >
- >If you have an a2090a, the software should be the same. You should
- >get a disk with this (program is "prep"). Maybe 2.0 has hard disk
- >software? All the software does is prep the first cylinder to put
- >information there.
-
- I'd claim you'll have major problems if you really want to low-level
- format the drive, ie. send the SCSI_FORMAT command to the drive. All the
- hddisk.device does (when asked to by prep) is scribble 0-buffers on the
- whole disk, using WRITE commands. It does *never* use the SCSI FORMAT
- command. Now if you wanted to issue this command the drive using
- SCSI-direct commands, you'll face the tons of bugs lurking in hddisk.device
- regarding scsi-direct. There are kludges to get around some of them, but
- I guess it's not possible to really define a reliable protocol to execute
- scsi-direct commands with hddisk.device.
-
- -Markus
-
-
- --
- Markus M. Wild - wild@nessie.cs.id.ethz.ch | wild@amiga.physik.unizh.ch
- Vital papers will demonstrate their vitality by spontaneously moving
- from where you left them to where you can't find them.
-