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Date:      Thu, 6 Apr 1995 21:11:30 -0400 (EDT)
From:      Mark Hittinger <bugs@ns1.win.net>
To:        freebsd-bugs@FreeBSD.org
Subject:   re: kern/302: changing st tapes crashes system
Message-ID:  <199504070111.VAA07189@ns1.win.net>

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> Subject: kern/302: Changing st tapes after extract crashes system
> >Number:         302
> >Synopsis:       Changing st tapes after extract crashes system
> 
> 		dd if=/dev/qic24 bs=1024k | tar xvf -
> 		(remove tape, insert new tape)
> 
> 	Just after inserting the new tape, a bunch of "swap pager failed"
> 	messages fly by on the console and the system resets (no panic
> 	or crash dump).  The IDE boot drive is left unresponsive, requiring
> 	use of reset button.
> 
> 	This bug has been present since 2.0.  It was not present in 1.1.5.1.

I see this with a WangDAT-3400dx and a bt946c controller.  I increased the
rewind/eject timeout in st.c and increased the "abort" timeout in bt742a.c.

With timeout increases, if the system is quiet when you close/rewind the drive
then nothing wild happens.

If you use unmodified st/bt742a then the disks will all get bit sprayed
every single time you rewind/close the tape.

Regards,

Mark Hittinger
bugs@win.net



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