-----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Bob Armstrong Sent: 08 June 2012 23:58 To: hecnet at Update.UU.SE Subject: RE: [HECnet] Introducing myself... and my little network On 06/08/2012 03:53 PM, Rob Jarratt wrote: I was once told that a TF series drive might be able to read past the error, but that TKs won't. FWIW, The TFxx drives have DSSI interfaces. The TZ drives are SCSI (e.g. TZ85 or TZ87). The TK drives (TK50, TK70) have DEC proprietary interfaces. A TF8x drive isn't going to do you any good unless you have a MicroVAX with a DSSI controller - Yes, I have two machines with DSSI. a TZ8x drive can at least be connected to any VAX or PDP with SCSI. AFAIK there isn't any difference, other than the interface, between a TF85 and a TZ85, or a TF87 vs TZ87. I don't think there's such a thing as a TK85 or TK87 - DEC dropped the proprietary interface after the TK70s. And I don't think there were any DSSI drives after the TF87. I know I have a TZ85 or TZ87 (maybe even both) somewhere but whether it's any better at reading bad TK50s I won't even speculate. BTW, If anybody has a TF drive that they'd like to swap for a TZ, let me know. I've got a rack of DSSI drives (RF7x and RF3x) that'd love to have a little tape drive for a cousin :-) I too would like to find any TF or RF drives, also would like to find a KFQSA so I can try out my KA655 CPUs. Regards Rob