> -----Original Message----- > From: cctalk <cctalk-boun...@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@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
