Date: Wed, 14 Jun 2000 08:48:26 +1000 From: "Andrew Reilly" <areilly@nsw.bigpond.net.au> To: Ryan Turner <ryan@workstation.dhs.org> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: 2048 byte media Message-ID: <20000614084825.A51585@gurney.reilly.home> In-Reply-To: <Pine.BSF.4.21.0006130122340.28233-100000@workstation.dhs.org>; from ryan@workstation.dhs.org on Tue, Jun 13, 2000 at 01:23:06AM -0400 References: <Pine.BSF.4.21.0006130122340.28233-100000@workstation.dhs.org>
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On Tue, Jun 13, 2000 at 01:23:06AM -0400, Ryan Turner wrote:
> Is 2048 byte media supported? The last time I tried using it was 2.2.8
> I currently have to use a windows box to access it. If I could use
> it on freebsd I could finally get rid of windows.
It's "just worked" under -STABLE since whenever the "da" driver
replaced the "sd" one, whenever that was. I'm on 4.0-STABLE
now, and do nightly backups to a Fujitsu 640M MO drive.
From memory, disklabel or the kernel or the combination of the
two aren't happy (or weren't the last time I tried it) to use
the "auto" argument. I've always had to give it a disktab entry,
and I use one of these:
mo640|F640|dangerously dedicated Fuj R640:\
:ty=removable:dt=SCSI:rm=#3600:\
:se#2048:nc#151:nt#64:ns#32:sc#2048:su#309247:\
:pc#309247:oc#0:bc#8192:fc#2048:
R640|fdisk sliced Fujitsu R640:\
:ty=removable:dt=SCSI:rm=#3600:\
:se#2048:nc#151:nt#64:ns#32:sc#2048:su#309216:\
:pc#309216:oc#0:bc#8192:fc#2048:
Actually, I think that I always fdisk and label a partition
manually, and then use the sliced version these days. The
dedicated one might not work any more.
While I'm rambling about experiences with MO drives, I should
mention that I only leave this drive mounted long enough to do
the backup. I found that if I left it mounted continuously,
then at some random time it would stop talking to the SCSI
system (lots of "retry" "media fault" type messages in the
logs, and no access through the file system). Sorry for such
a vague report, but this hasn't happened for a very long time
now. I suspect that it would heat up and not recalibrate
properly, but I'm hardly knowledgeable enough to make that sort
of determination.
--
Andrew
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