SUMMARY: jaz disks

From: Dirk Grunwald <grunwald_at_foobar.cs.colorado.edu>
Date: Fri, 26 Jul 1996 12:32:59 -0600 (MDT)

Someone else asked about this, and I relized I hadn't posted a summary
of my experiences with the Iomega Jaz disks.

We bought 5 drives. One drive is a little flakey & is being
returned. We've used the Jaz on W/95, W/NT, Solaris, Linux & Digital
Unix. They're fairly generic SCSI devices, all told. The Digital Unix
"scu" deals with them very nicely.

It's best to buy media in the 5-pack. If you get it from Internet
Shopping Network, you pay ~$90-ish/disk, rather than $130 in singles.

--
Yes, I've been using the Iomega Jaz drive with some success. In fact,
I'm using it as a boot device for some work in developing a device
driver. They're pretty fast, about 2/3 the speed of an rz28 for random
file I/O. Much faster than the Zip (100MB).
Here's what I did:
(1) identify a free SCSI id number, plug in your drive to 2100.
    For the moment, assume the SCSI device is /dev/rz5
(2) The "JazTools" disk that comes with the drive is write protected.
    You need to format the drive to clear the write protection, or
    install the JazTools on a Win95 or W/NT box and disable the write
    protection (anyone know how to do this from 'scu'?)
    To format (takes ~30 minutes), run "scu -f /dev/rz5c format media"
(3) You need to lay down a disk label. These directions are for OSF/1 V3.2,
    I think things changed under 4.0 slightly. Add the following to
    your /etc/disktab.
jaz-multi|IOMEGA Jaz 1GB drive:\
        :ty=winchester:dt=SCSI:ns#3217:nt#1:nc#650:\
        :oa#0:pa#205888:ba#8192:fa#1024: \
        :ob#205888:pb#205888:bb#8192:fb#1024: \
        :oc#0:pc#2091050:bc#8192:fc#1024: \
        :od#411776:pd#1679274:bd#8192:fd#1024:
jaz-single|IOMEGA Jaz 1GB drive:\
        :ty=winchester:dt=SCSI:ns#3217:nt#1:nc#650:\
        :oa#0:pa#2091050:ba#8192:fa#1024: \
        :oc#0:pc#2091050:bc#8192:fc#1024:
    I use the "jaz-single" entry when I just want a single large disk.
    I use the "jaz-multi" entry when I want a bootable system for O/S
    work (100MB /a, 100MB swap, 800MB /d).
    Run the command e.g,:
	disklabel -rw /dev/rz5c jaz-single
    Check that the disk labels are happy:
	disklabel -e /dev/rz5c
(4) Create file systems:
	newfs /dev/rz5c jaz-single
(5) Mount...
	mount /dev/rz5c /mnt
(6) Beat on your disk. You should have about 1010MBytes of usable space.
    I tweaked the disk geometry entries to reduce space wastage.
(7) When you're done, un-mount and eject your disk..
	umount /mnt
	scu -f /dev/rz5c eject

Received on Fri Jul 26 1996 - 21:08:39 NZST