Subject: Re: Device Drivers Info wanted
To: None <amiga@NetBSD.ORG, firstname.lastname@example.org>
From: Olaf Seibert <email@example.com>
Date: 02/12/1996 18:17:39
firstname.lastname@example.org (John Marohn) asked:
> Where can I find info on how to write a device driver for a Magneto Optical
> drive? Maybe I can modify an existing driver.
> Currently it is recognized as a scsi disk (sd?). I don't know the disk
> geometry so using it as a disk is out of the question. I would like to use
> it as a tape drive. I can tar to it as long as I don't exceed the capacity
> of the disk.
MO drives that act like a disk work just fine as a disk. I am using
one right now, in fact. The 1.0 kernel (i386) reports it thusly:
ncr0 targ 4 lun 0: <FUJITSU ,M2512A ,1408> SCSI2 direct removable
sd2 at scsibus4sd2(ncr0:4:0): asynchronous.
sd2(ncr0:4:0): illegal request
sd2: could not mode sense (4); using ficticious geometry
: 217MB, 217 cyl, 64 head, 32 sec, 512 bytes/sec
> The drive is reported by NetBSD as not to support a mode sense command.
but then it goes on using some geometry anyway.
___ Olaf 'Rhialto' Seibert D787B44DFC896063 4CBB95A5BD1DAA96
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