Date: Sun, 25 Jan 1998 18:04:39 -0600 (CST) From: Chris Dillon <cdillon@tri-lakes.net> To: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> Cc: scsi@FreeBSD.ORG, Donald Burr <dburr@POBoxes.com> Subject: Re: Minor annoyances with ZIP Plus Message-ID: <XFMail.980125180805.cdillon@tri-lakes.net> In-Reply-To: <199801250656.XAA23323@narnia.plutotech.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 25-Jan-98 Justin T. Gibbs wrote:
>> Don't worry; these errors are "normal". Well, as "normal" as Iomega SCSI
>> devices get, anyway. Apparently Iomega subscribes to some "weird",
>> non-standard variant of SCSI, in that their devices do not support certain
>> SCSI commands mandated by the SCSI specification, specifically, those SCSI
>> commansd that ask a device to specify its geometry (size, #
>> heads/sectors/etc.). When presented with this anomalous behavior, the
>> FreeBSD driver guesses the device's geometry, and so everything still
>> works.
>
>This isn't the case. FreeBSD was being silly in asking for the optional,
>rigid geometry page, which the IOMega guys chose not to implement. Since
>FreeBSD stopped using physical geometry to "optimize" disk I/O (which
>doesn't work on the ZBR drives of today), asking for the rigid geometry
>wasn't buying us anything and the code was recently changed to use the
>information returned by the Read Capacity command instead.
Just how recently was this? :-) If within the last couple of days in stable,
i'll compile a new kernel and see how I fare. If its only in current, i'll
just have to put up with the errors for now, i guess (i'm feeling adventurous
enough to try current, though).
--- Chris Dillon
--- cdillon@tri-lakes.net
--- Powered by FreeBSD, the best operating system on the planet
for Intel x86 based computers.
---- (http://www.freebsd.org)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.980125180805.cdillon>