Jay West wrote:
Cheesy/worn
media?
Nah, I tried two different tapes, both are brand new out of the box still
shrinkwrapped, and I had cleaned the heads twice over the past two days.
I'd be for borrowing a differential SCSI
adapter and trying the
original setup.
I may give that a whirl, but... since the drive and host are definitely
working fine at 800/1600, and because the drives offline diags (not
involving the host) fail at 3200 and 6250, I don't think it's the interface
in the drive. Maybe I'm missing something?
The only thing I can really think of would be a mechanical issue,
like jerky or inconsistent tape movement at higher speed. But even that
wouldn't explain the fact that it doesn't even try at 3200bpi.
The reason I suggested replacing the diff interface card is that I've
mixed and matched the internal boards in the old Exabyte EXB-8200 8mm
drives and gotten really weird behavior. If the firmware revs in the
contributing drives weren't _very_ close, it was a crapshoot. I have no
idea if that could be the case with your drive.
I do diagnostics from a very low-tech perspective. If Device X was
working or supposedly working before I altered it and it doesn't work
now, I figure the odds are high that the alteration is a contributing
factor. If I don't have the docs or the equipment to do more specific
testing, going back to the original configuration is my first step.
Doc