4 Feb
2013
4 Feb
'13
10:01 a.m.
On Feb 3, 2013 9:49 PM, "Guy Sotomayor" <ggs at shiresoft.com> wrote:
On Feb 2, 2013, at 5:11 PM, Pete Turnbull wrote:
accessing a number of shared disks.
On 02/02/2013 18:11, Dave McGuire wrote:
Did this while I was at IBM. We typically had demos of 2-3 systems
On 02/01/2013 09:42 PM, Jeff Jonas wrote:
A company called Lingenuity did the same with a product called SCSI
Share, for Acorn computers, around 1989 or 1990. It allowed six
computers to share a SCSI drive, which appeared as two partitions, one
read-only for software and one read-write for shared files. Of course
distances were limited by the SCSI bus, which meant you needed decent
cables and all the devices more or less on the same tabletop. But I
have seen it working on more than one occasion.
Long ago when SCSI was young
and just an 8 bit parallel bus,
Ampro littleboards advocated using the SCSI bus
for peer to peer communications, not just master/slave.
Did anyone else do that?
One used to be able to do it with Suns, in the Good Ol' Days. I've
not done it myself but have seen it done. It was really quite neat.
It's called multi-initiator mode. Though it was supposed to work (as per
spec), not all devices were great at having multiple initiators (hosts) on
the same bus.
Slightly different, Adaptec did produce a device called a "Nodem" which
was a SCSI device that connected to ethernet. Was pretty cool in concept.
However, I spent a lot of time working with Adaptec and it has some
serious bugs that they could never quite work out. The biggest was they
had a minimum interpacket time in order to receive an ethernet packet.
Unfortunately, the Nodem's interpacket time was longer than the minimum
interpacket time on ethernet. This resulted in some cases of missed
packets. :-(
TTFN - Guy
They had scsi<->ethernet adapters for Macs that didn't have expansion slots
I think Asante made them.