12 Jan
2009
12 Jan
'09
11:20 a.m.
From: jim s
Sent: Saturday, January 10, 2009 8:54 PM
The HVD bus is designed such that if you plug it into
a SE bus it will
go into reset and go passive. There is a signal DIFFSNS on the HVD that
will disable the bus. Not good, but better than nothing if you mess up
and plug them together.
I don't think so. The XKL Toad-1 was designed with FASTWIDE differential SCSI,
and any single-ended peripheral that got connected accidentally was guaranteed
to lose the magic smoke and go off to live with <insert $DEITY here>. We were
in complete accordance with the SCSI specs.
[ Regarding Paralan: ]
The link below points to a company who makes the
converters. Sometimes
they are available on Ebay, and there are some repackaged by Compaq and
HP that show up. They make both the 50 an 68 pin versions. I doubt
they will work over 5m/sec with HVD involved, however.
They work at 10MB/second on the Toad. We had to include one in the system
because HP DAT drives and Quantum DLT drives were unavailable with differential
interfaces.
I purchased a Paralan HVD/LVD converter here in order to attach a SCSI JBoD
array to the Toad, in anticipation of hosting a lot of data.
Rich Alderson
Server Engineer, PDPplanet Project
Vulcan, Inc.
505 5th Avenue S, Suite 900
Seattle, WA 98104
mailto:RichA at vulcan.com
(206) 342-2239
(206) 465-2916 cell