*BSD News Article 68501


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From: kyle@uunet.uu.net (Kyle Jones)
Newsgroups: comp.sys.mac.hardware.storage,comp.sys.ibm.pc.hardware.storage,comp.unix.bsd.misc
Subject: Re: what are the reserved sectors on 1GB Jaz disks
Date: 14 May 1996 13:57:42 -0400
Organization: UUNET Technologies Inc, Falls Church VA USA
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Message-ID: <4nahim$qin@wendy-fate.uu.net>
References: <4n8ges$ou9@wendy-fate.uu.net> <MMEAD.96May14114259@Glock.COM>
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matthew c. mead <mmead@Glock.COM> wrote:
 > kyle@uunet.uu.net (Kyle Jones) writes:
 > 
 > > Anyone know which sectors on a Jaz disk need to be left alone in
 > > order to avoid erasing geometry information that the drive
 > > (apparently) needs to recognize the disk?  I think this is the
 > > reason why my drive suddenly stopped recognizing a disk after I
 > > put a UNIX filesystem on it and then ejected the disk.  When I
 > > send a SCSI test unit ready command I get back "incompatible
 > > medium installed" (asc 30h, ascq 92h).  The access light blinks
 > > for a while but the drive doesn't spin up.
 > 
 > Whoa.  I haven't seen this, and I've walked *all* over my JAZ
 > disks with FreeBSD.  If the data doesn't need to be recovered, I'd try
 > lowlevel formatting it and starting over.  What operating system and
 > version did you use to put the filesystem on it?

BSD/OS 2.0.  I'm now think the drive has died.  I've tried three
brand new disks: two give the above error and the third gives
"not ready, manual intervention required".  None of them even
spin up, so formatting is out of the question.  No matter,
I only got as far as putting an empty filesystem on the disk
before the drive stopped working.

Thanks for the response.  At least now I know that scragging the
FDISK partition, boot blocks and other stuff at the beginning of
the disk should not make the disk unusable.  (Information, I note
grimly, that I was not able to obtain from Iomega tech support
after a 45 minute phone wait. :-( )