notes@isucs1.UUCP (01/13/85)
I have a problem with a tu78 tape drive; here are the symptoms: Returns a hard error when "dumping" at 6250 mu0: hard error bn1440 mbsr=3080<DTCMP,DTABT,MBEXC> er=6519 ds=162200<RDY,PRES,ONL,BOT,AVAIL> note: bn varries from 400 to 30000. Problem seemed to occure after we had an air-conditioner breakdown, but I am not 100% sure of this. Doesn't return any errors when "tar"ing at 6250 or "dump"ing at 1600bpi Dec ran diag. and swapped read & write boards with no luck. They gave the drive a clean bill of health, and said dig a little further and call when you have more information... Well I am digging ... Has anyone seen this problem before, or can decode the error code given ? I am not happy with having to do level 0 backups on 12 tapes, so any information would be most welcome. Ted Fidder Iowa State University Ames Iowa USENET: ...umn-cs!fidder CSNET: fidder@iowa-state
chris@umcp-cs.UUCP (Chris Torek) (01/18/85)
Well, according to vaxmba/mtreg.h, er=6519 decodes into interrupt code
# 031, which is ``TU Fault A''. I don't know what that *really* means.
(Someday they'll put in bit decoding for the error register printf...)
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In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
UUCP: {seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet: chris@umcp-cs ARPA: chris@marylandBostonU SysMgr <root%bostonu.csnet@csnet-relay.arpa> (01/19/85)
We have a TU78 (recently made it dual-port) and have had no problems (we do full dumps once a week, incs about every other day all @6250 from both our 780 and 750.) We have had no peculiar behavior from the drive (4.2bsd.) We have had peculiar behavior from field circus like you mention (blame the software...hey, it's UNIX!) 1. I think you have a hardware problem. 2. If they claim they cannot service the machine because you run UNIX ask them why they signed the service contract and took your money? They get the hint. -Barry Shein, Boston University