Date: Thu, 11 May 1995 14:59:34 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: fcawth@squid.umd.edu (Fred Cawthorne) Cc: chuckr@Glue.umd.edu, FreeBSD-Questions@FreeBSD.org Subject: Re: Zip drives Message-ID: <199505111859.OAA06912@hda.com> In-Reply-To: <9505111713.AA27882@squid.umd.edu> from "Fred Cawthorne" at May 11, 95 01:13:46 pm
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Fred Cawthorne writes:
>
> >
> > Has anyone tried out the Iomega Zip drives? I have a Adaptec 2842, will
> > that drive one around the block? Are there any gotcha's about mounting
> > or umounting, other than what I'd use for, say, a floppy?
> >
> I have one on my FreeBSD 950322-SNAP machine here...
> Here's how it is probed:
> (ncr0:6:0): "IOMEGA ZIP 100 L.27" is a type 0 removable SCSI 2
> sd1(ncr0:6:0): Direct-Access
> sd1(ncr0:6:0): ILLEGAL REQUEST asc:24,0Invalid field in CDB
> sd1 could not mode sense (4). Using ficticious geometry
> 96MB (196608 512 byte sectors)
I'm going to add something to print out what it doesn't like about the
CDB.
> have changed..." and then gives me "device not configured" messages
> when I try to access any of the /dev/sd1* devices... (i.e. I can't mount
> it again until I reboot)
> Otherwise, it is nice. Has anybody else seen this kind of problem with
> a removeable disk???? I get ~700 K/sec with my NCR 810 scsi controller
> with iozone creating and reading a 32 meg file...
> Any ideas???
> Is there a bug in the code that re-reads the disklabel when the medium
> is changed???
It is supposed to lock out access until the disk is completely closed
and reopened. If you unmounted the drive and nothing had the drive
open then a bug has snuck in and this code in sd.c:
> /*
> * If somebody still has it open, then forbid re-entry.
> */
> if (dsisopen(sd->dk_slices)) {
> errcode = ENXIO;
> goto bad;
> }
is returning true when it shouldn't be.
--
Peter Dufault Real Time Machine Control and Simulation
HD Associates, Inc. Voice: 508 433 6936
dufault@hda.com Fax: 508 433 5267
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