> The big problem with AI is that the tape MASSBUS is dead. I don't have a
> clue as to why. Diagnostics are very vague, closest thing I get on the
> controller is a control bus parity error/8915 bit fiddler error.
> According to the limited TOPS20 diags, this could be anything.
>
> CZ
First -- this is a couple of points on quick and dirty massbuss
troubleshooting.
There are a number of problems that can cause MCPE (Massbuss Control
Parity Errors)...
The first thing is -- bad round bus cable with a bent pin and bad
contact.
The second can be bad flat cables from the three massbus transceivers
which also can have backplane seeting problems -- the double height
cards wiggle a lot. (common in TM03's and RPxx DCL's).
It also could be the 8915 bit fiddler -- but the failure sounds
like the equivalent of the TM03 wrap the world data wrap through the
controller.
--Bill
--
bpechter_at_monmouth.com | FreeBSD since 1.0.2, Linux since 0.99.10
| Unix Sys Admin since Sys V/BSD 4.2
| Windows System Administration: "Magical Misery Tour"
Received on Tue Nov 28 2000 - 12:09:45 GMT