thad@cup.portal.com (Thad P Floryan) (11/05/90)
kim@mathcs.emory.edu (Kim Wallen {Psy}) in <6479@emory.mathcs.emory.edu>
offers some 3B1 items for sale, and in the notice appears:
"... One 3B1 STARLAN card is modified so it doesn't clash with
tape backup unit, second one is not.
Interesting. I've been using tape backup and StarLAN and haven't experienced
any problems. Is the modification required for only certain ``REV.'' levels,
or is there something insidious that will jump out and bite some day?
What is the actual modification? It's my recollection that nothing of this
nature has been discussed in this newsgroup during the past several years.
Thad Floryan [ thad@cup.portal.com (OR) ..!sun!portal!cup.portal.com!thad ]psfales@cbnewsc.att.com (Peter Fales) (11/05/90)
In article <35593@cup.portal.com>, thad@cup.portal.com (Thad P Floryan) writes: > kim@mathcs.emory.edu (Kim Wallen {Psy}) in <6479@emory.mathcs.emory.edu> > offers some 3B1 items for sale, and in the notice appears: > > "... One 3B1 STARLAN card is modified so it doesn't clash with > tape backup unit, second one is not. > > Interesting. I've been using tape backup and StarLAN and haven't experienced > any problems. Is the modification required for only certain ``REV.'' levels, > or is there something insidious that will jump out and bite some day? According to information I have (a several generation old copy): "When the Release 1 NAU and the Tape Back-Up unit are in a UNIX PC, the machine might crash leaving the following error messaes on the screen with instructions to record the panic information and perform a hardware reset. Panic: Page Fault in Kernel To resolve this, the Tape Back-Up unit board should be in slot 1 (left-most slot as seen from the back) and the NAU should be in slot 2. If putting the boards in the correct slots does not alleviate the problem, then a 47pf ceramic capacitor should be removed from the NAU. (The 47pf ceramic capacitor is only on the older versions of the NAU). Here is my attempt to draw the associated diagram. ------------------------------------------------------- | STARLAN NAU | --IC-- --IC-- C O --IC-- --IC-- N N --IC-- O | | --IC-- E ^ C --IC-- 47pf --IC-- T O --IC-- --IC-- R | -------------------------------------------------------- -- Peter Fales AT&T, Room 5B-420 N9IYJ 2000 N. Naperville Rd. UUCP: ...att!ihlpb!psfales Naperville, IL 60566 Domain: psfales@ihlpb.att.com work: (708) 979-8031
dave@das13.snide.com (Dave Snyder) (11/06/90)
In article <35593@cup.portal.com>, thad@cup.portal.com (Thad P Floryan) writes:
-> kim@mathcs.emory.edu (Kim Wallen {Psy}) in <6479@emory.mathcs.emory.edu>
-> offers some 3B1 items for sale, and in the notice appears:
->
-> "... One 3B1 STARLAN card is modified so it doesn't clash with
-> tape backup unit, second one is not.
->
-> Interesting. I've been using tape backup and StarLAN and haven't experienced
-> any problems. Is the modification required for only certain ``REV.'' levels,
-> or is there something insidious that will jump out and bite some day?
->
-> What is the actual modification? It's my recollection that nothing of this
-> nature has been discussed in this newsgroup during the past several years.
->
Wow! I haven't heard about this for 4 years now. While working at an AT&T
Var, I remember hearing the head technician mumble something about this
same thing. If I remember correctly, don't bite my head off if I'm wrong, the
machine would have problems if the "tape backup" card wasn't in slot 1 and
the StarLAN card wasn't in slot 2. Any ideas anyone?
DAS
--
David Snyder @ Snide Inc. - Folcroft, PA
UUCP: ..!uunet!trac2000!das13!dave INTERNET: dave@das13.snide.com