On Aug 2, 2016 7:50 PM, "Douglas Taylor" <dj.tayl...@comcast.net> wrote: > > I had 3 different types of SCSI CDROM's and none of them worked, they are DEC RRD42, Toshiba and a Sony. > The DEC was dead, removed the drive and applied power that I know is good (from a PC power supply in a working PC) > and nothing, no led, nothing. The toshibas would spit the caddy back out after a few moments and the Sony > refused to eject the caddy. > Is there a SCSI CDROM to look for? > I'm curious about the 68 pin scsi drives, what type do you use? The adapter, I guess it is 50 pin male to 68 pin male? > Doug
I have had good luck with Plextor SCSI CD-ROM drives. I picked up some old Plextor 4x, 6x, 8x caddy drives for a couple bucks each a RE-PC Seattle a while ago. They have a 512-byte block mode jumper you need to set. I got a box of 25+ IBM DDRS-39130 9GB 68-pin SCSI hard drives cheap from someone on Craigslist a while back and have been using those with 50-pin male / 68-pin male adapters. Only issue is that the Emulex UC07 firmware is incompatible with them. The drives have a mode page that the UC07 doesn't understand and it tries to do a mode select with some invalid bits for that page, which fails. Then it keeps retrying that failure forever. No problem with the CMD and Dilog controllers. I often use the SG3utils sg_format utility to soft resize the 9GB drives down to something smaller. 9GB might make sense on a VAX, not so much on a PDP-11. Also, the built in SCSI on a VAX 3100 doesn't support drives over 1GB.
