home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!auspex-gw!guy
- From: guy@Auspex.COM (Guy Harris)
- Newsgroups: comp.sys.sun.admin
- Subject: Re: Tape Drive Lock-Up
- Message-ID: <16616@auspex-gw.auspex.com>
- Date: 25 Jan 93 23:23:00 GMT
- References: <1993Jan24.214758.5393@eskimo.com> <KATZ.93Jan25111012@carbon.elements.rpal.rockwell.com>
- Sender: news@auspex-gw.auspex.com
- Organization: Auspex Systems, Santa Clara
- Lines: 31
- Nntp-Posting-Host: auspex.auspex.com
-
- >I believe that there is abug in the SCSI drivers for 4.x.
-
- There may well be one, but, while it might explain the problem he has
- with the 8mm drive on his 4/670, it sure won't explain the problem he's
- having with the 9-track drive on his 3/280, given that the latter drive
- is attached to a Xylogics tape controller, not a SCSI controller (as
- indicated by the errors saying things such as "xt0"....
-
- >I reported
- >this bug to Sun about 1 year ago. They supposedly spent long periods
- >of time trying to track down the bug and could never find the source.
- >I continue to suspect that the driver contains some state info that is
- >not getting reset properly after certain errors are detected.
-
- I can't speak for the SCSI driver bug, but it took me about 3 minutes to
- find something that might be the reason why the drive can't be opened
- once the problem has occurred on the 9-track drive on the Xylogics
- controller:
-
- A quick look at the "xt" driver indicates that *if* the error occurs
- when the tape is opened (if the tape is being opened for writing, it
- appears to write two tape marks before returning from the open), the
- driver doesn't clear the "tape drive is open" flag before returning an
- error indication.
-
- Unfortunately, finding the problem doesn't help get a fix out; the
- original poster'll have to talk to Sun to get that, and given that the
- machine's a Sun-3, I don't know how much of a response he'll get.
-
- Also, I've no idea why the drive *does* get the timeout in question;
- he'd have to get Sun to answer that one.
-