Date: Sun, 10 Nov 1996 22:15:54 -0500 (EST) From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> To: ponds!klemm.gtn.com!andreas, gibbs@freefall.freebsd.org Cc: ponds!marlin.com.br!acorreia, ponds!freebsd.org!hackers Subject: Re: Problems restoring Backups !!! Message-ID: <199611110315.WAA13515@lakes.water.net>
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> > >On Sat, 9 Nov 1996, Justin T. Gibbs wrote: > >Hi Justin, thanks that you take the time on that. BTW, I just wrote > >a problem report. I'm not sure if I had a kernel with your changes from > >Nov. 7th. But I'm just cvsupping and will repeat that with a new kernel. > > Your problem report had the information I needed to understand and fix your > problem. I changed the QUEUE FULL condition code to not do an > unconditional retry a little while ago, and you must be running out of > retries. You should be able to get this kind of thing to happen in other > scenarios besides dumping. I'll fix this today. > Is it possible this is related to the aha2940 problems I've been seeing with resetting the SCSI bus? (With 2.1.5-STABLE). Just to catch up - when I write a tape (say, with 'tar') [this is a WANGTEK 5150ES] - things go fine until the operation is complete. Then the tape drive begins to rewind and I get lots of messages, followed by (sometimes) a loop some where with the SCSI bus being reset over-and-over... I say sometimes because if the tape happens to be in a position where the rewind is quick, the problem doesn't degrade to a total SCSI lock-up. Here's my previous description of one of these: > Now, every time I write to the tape device (a Wangtek 5150ES QIC-150), > when I get to the end of the writing, and the tape begins to rewind; > *whamo* - my SCSI bus locks up.... > > The messages, of course, are not logged in /var/log/messages - because > nothing can be written out. > > I've jotted them down - from my paper notes they are: > > ahc0: Issued Channel A Bus Reset #1. n SCB's aborted > sd0(ahc0:0:0) timed out in message out phase, SCSISGI==0xb4 > sd0(ahc0:0:0) asserted ATN - device reset in message buffer > sd0(ahc0:0:0) timed out in message out phase, SCSISGI==0xa4 - Thanks - - Dave Rivers -
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