I've tried building all the NetBSD 3 packages on two different Quadra
840 systems (one has 32 MB memory, the other has 128 MB, both have 18 GB
Seagate SCSI disks), and invariably they will lock up after about a
week, but not at the same point.  I even tried a spare system board,
same result.  An SE/30 also locked up, after about 3 weeks.  If someone
knows a way to capture the state of the systems after a hang for
debugging, please let me know.

-Stan

-----Original Message-----
From: port-mac68k-owner@NetBSD.org [mailto:port-mac68k-owner@NetBSD.org]
On Behalf Of John Klos
Sent: Sunday, April 16, 2006 3:51 PM
To: port-mac68k@netbsd.org
Subject: NetBSD 3 SCSI broken

Hello,

After many months of testing things when I've had spare time, I can now
say definitively that Quadra class machines (605, 650, 800) will
eventually lock up under heavy SCSI usage. This does not happen under
NetBSD 1.6.x.

I've tried several different kinds of SCSI drives, with and without
command queueing, syncronous and asyncronous, the same drives with 1.6
and 3, and I have two long term test machines which have significant
uptime with 1.6.x and can be locked up by cvs'ing src and pkgsrc at the
same time.

It's hard to believe that there are so few people out there that who
either never thrash their disks or who don't observe the same lockups.
Or perhaps they think they're isolated or something. Not sure, but it's
definitely repeatable, and I've tried four different machines with as
many different hard drives now.

Ideas, anyone?

John