scsi hangs [drow at cs.cmu.edu: Re: CD-writers] (fwd)

[Daniel Jacobowitz]

On Mon, Jan 04, 1999 at 10:38:45PM +1100, Paul Mackerras wrote:
> Brad Midgley <brad at pht.com> wrote:
> 
> > i have tried out the current vger kernel and i'd characterize it as "five
> > times" as stable. meaning i can copy 125 megabytes from a jaz on the
> > external bus to a drive on the internal bus before it crashes--with
> > 2.1.130 i could only copy about 25 megabytes before it crashed. the error
> > when it crashes is always:
> 
> Actually, I'm not sure that the vger version had the locking exactly
> right before.  The version in vger is now the same as the version
> currently in the official tree, and I am moderately confident it's OK.
> If you can reproduce it with that version, I really will have to dig
> deeper.
> 
> We will never get the sd.c patch into the official version because it
> breaks SMP machines.  I know because that's what happened on my SMP
> powermac. :-)


I don't have the exact messages, but attempting to use an external CDR
(boot drive on MESH, burner on 53c94) locks up with a bunch of illegal
sense requests.  Then it tries to reset the external bus, times out,
claims to try harder, and more or less locks up.

Dan

/--------------------------------\  /--------------------------------\
|       Daniel Jacobowitz        |__|     CMU, CS class of 2002      |
|   Debian GNU/Linux Developer    __   Part-Time Systems Programmer  |
|         dan at debian.org         |  |        drow at cs.cmu.edu         |
\--------------------------------/  \--------------------------------/

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