🚀 go-pugleaf

keith@valperga.demon.co.uk (Keith Crook) wrote:

==> Many thanks to Peter, Paul, Rebecca & Rowland for their contributions. 
You
==> all give me hope, despite seeing somewhere on one of my newsgroups that
==> there was a problem with booting from an external HD.  I'll experiment
some
==> more but here are answer to your queries.
==> 
==> I formatted and intitialiised the Jaz cartridge and installed 7.6.1
from
==> the CD.  I selected the cartridge as the start-up disk from the control
==> panel on the 7200/90 and checked that this was recognised on the Jaz
==> cartridge system.  I shut down both the 7200/90 and the Jaz. 
Re-started
==> the Jaz drive; inserted the cartridge and waited for it to spin up;
==> re-started the 7200/90.  Result: the 7200/90 hung at the Happy Mac
symbol. 
==> This happened twice, at which point I remembered (?) a thread somewhere
==> about external HD troubles. 

I know you've solved your problem when updating to 7.6.1, but there is
another gothcha it could have been (and might bite you later).

The Jaz driver is held in 2 places - the system folder and the disk itself.
 If you're booting from the Jaz drive, the system needs a driver before
it's read in the system folder, so it's the one on the disk that's used. 
On the other hand, if you turn the Jaz on without a disk in, the driver is
loaded from the system folder and automatically mounts the disk without
having to refer to the disk's driver.

Often, when updating drivers, people forget to check what's on the disks
and an incompatible driver/system version can result.  This usually occurs
when people upgrade their OS to, for example, 7.6.1 and beyond, which came
with driver version 5.0.3 (Ithink - I'm using 5.1.1 with B8.0), which
causes problems with 7.6 (I think 5.0.1 was the last driver that could run
comfortably with 7.6), but forget to ensure that the drivers on the disk
itself are updated.  I suspect you have the reverse problem.

Note that mounting the drive with SCSIProbe or similar can have the same
effect, which is why Iomega doesn't recommend it.

Sorry to be late and irrelevent to the discussion.

Yours,

Andrew

*** This note was written listening to "Smile" by Dianne Reeves - excellent
track!! ***