On Tuesday, March 20, 2012 02:27:55 AM Jon Elson did opine: > This sounds OT, but has a tie-in to EMC, as we are trying to be > able to read a tape that has the last work on APT/360 on it. > > I have a CDC Keystone 9-track tape drive that appears to be working > fine. I have a salvaged SCSI to Pertec formatted interface converter > that worked > for a while, and I was able to dump a few blocks off some tapes with > it, then it died!
Are you in a position to be able to scope probe the data lines on this controller? Dying isn't the normal failure mechanism, poor termination is. Most of this stuff with its 50 pin scsi-2 interfaces will fall over the instant the PSU's 5 volt line drops below 4.98 volts due to a lack of an adequate logic one noise and cable ringing margin. Putting it on a psu you can tickle up to 5.1, or even 5.2 volts will often bring it back to life like magic. > So, does anyone know where to get a SCSI to > Pertec formatted interface converter board? I have an Advansys ABP-940 card here that I used at one time with a succession of tape drives but eventually gave up using tapes entirely since the biggest drives I could afford were DDS2 DAT's, 4 gigs compressed & not at all dependable. The linux driver is known to be racy, but that didn't seem to be a problem for me as long as the terminations were correct. I also have a drive that read/writes the 525 meg (and smaller) format of cartridge tape that was I think called QIC. The first tape cartridge I pulled off the shelf above me was a Data General 150 megabyte which I believe this drive can also read/write, but its been at least 14 years since it was recorded, from the notes it was backed up by Diavolo Pro from my amiga. Unforch, backups on an amiga are usually worthless because the system never unlocks the files it boots from, so they will be missing from the backup. That was the straw that broke this camels back, I built a 400 mhz AMD K2 box & put redhat 5.0 on it, & the rest is history, I never tried to get that full blown a2k to boot again. You are welcome to either or both if it would do you any good, Jon. PM me where to ship to. > Or, does anyone know > where to get the SCSI interface board for a CDC 92185 tape drive? > > Or, does anyone know where a working 9-track 1600 and/or > 6250 BPI tape drive is that we could read some tapes on? > > Thanks, > > Jon > > ------------------------------------------------------------------------ > ------ This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> When God endowed human beings with brains, He did not intend to guarantee them. ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
