19 Mar
2019
19 Mar
'19
1:22 a.m.
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Charles Dickman
via cctalk
Sent: 19 March 2019 02:16
To: General Discussion: On-Topic and Off-Topic Posts
<cctalk at classiccmp.org>
Subject: SCSI2SD: Is it worth a try?
What is the experience with the SCSI2SD with old computers? It looks to be
SCSI-1 and SCSI-2 compatible and I see a lot of reports of usage on this list. I
am curious about how well it works and which version to get.
I a pre-V6 one for my Atari but have never used it in the Atari.
It is now in my IBM PC Server but its only used for backup.
Its in a single ended SCSI-1 card and its noticeably slower than the fast/wide spinning
disks in the RAID array.
Versions up to 5 seem to be GPLed and reasonably available. V6 does not
seem to have schematics or boards open sourced and I haven't seen a
supplier for them. The web page lists some sources, but they don't have the
V6 available.
V5 is GPL and the guy who built it was more than willing to talk about the code.
I was wondering about adding tape support but he says that?s harder than you think...
It looks like the V6 is not open because someone used
the design without
following the GPL.
Yes, Chinese vendors...
V6 claims synchronous transfers, but I don't think
most of my hardware
supports it. That consists of VAXstations and qbus scsi cards. If I was after
speed I wouldn't be using old hardware, but the speed has to be consistent
with the era.
I think a lot of hardware supports synchronous transfers. I think for me it was the
narrow/wide that slowed it down.
Chuck
Dave