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- Newsgroups: comp.unix.aix
- Path: sparky!uunet!usc!news.service.uci.edu!ucivax!raj
- From: raj@ics.uci.edu (Richard A. Johnson)
- Subject: Flakey problems with IBM 8mm tape drive
- Message-ID: <2B30E7E3.8595@ics.uci.edu>
- Organization: Univ. of Calif., Irvine, Info. & Computer Sci. Dept.
- Date: Thu, 17 Dec 1992 20:49:38 GMT
- Lines: 42
-
- We have an IBM RS/6000 model 520 system with an IBM 8mm tape drive attached
- (along with other SCSI disk drives enough to use up all SCSI unit numbers on
- the controller in case it makes any difference). Recently this 8mm drive
- began complaining most of the time about bad tapes (Specifically the infamous
- "Media Failure..." notice). At first I replaced the tape with a new one, but
- after doing that 3 times and cleaning the drive 3 times also, I began to
- suspect something else was the problem. I replaced the whole tape drive with
- another one from another system and used the same tape which it originally
- claimed was bad. This worked just fine! Thus, I came to the conclusion that
- the problem was with the tape drive itself. (Diagnostics says the problem
- could be tape, tape drive, or controller. Not much help.)
-
- Actually, we have another RS/6000 (model 930) which has 2 8mm drives, one of
- which displays this same problem and one of which works just fine. Both of
- those are on the same controller.
-
- All evidence would seem to point to the tape drive. I can even run the same
- backup (by name in case you care) on the same tape and with the same drive
- over and over again, sometimes it'll work just fine, other times it fails
- in different places.
-
- My local IBM office claims IBM has never heard of any problems like this, but
- since they have rarely been any help at all (usually they say they'll do
- something and then never do - a general IBM trait I've found over the many
- years I've worked with them), I'm wondering if anyone else has seen this
- problem. (I'm expecting that someone will say something like, "oh yeah! That's
- a common problem! You just ... to get around it!")
-
- Thanks for any help you can provide.
-
- By the way, since I haven't yet got my own Usenet feed up and running,
- I can't read this newsgroup as much as I need to. Please reply directly to me.
- If there's interest or if I find something really strange, I'll report it
- back to the net.
-
- -----------------------------------------------------------------------------
- U.S. Postal Monopoly address: Other addresses:
- Richard A. Johnson raj@ncgia.ucsb.edu (Internet)
- NCGIA Computing Resources Manager ucbvax!ucivax!raj (UUCP)
- Geography Department raj@VOODOO (via BITNET)
- U. C. Santa Barbara (805) 893-4677 (Phone)
- Santa Barbara, Ca. 93106
-