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Date:      Thu, 5 Feb 2004 15:33:16 -0500
From:      Damian Gerow <dgerow@afflictions.org>
To:        Kirk Strauser <kirk@strauser.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: -CURRENT barfing on UDMA on Via 8233
Message-ID:  <20040205203316.GB11717@afflictions.org>
In-Reply-To: <87brodco8c.fsf@strauser.com>
References:  <20040126035539.GP1456@sentex.net> <20040127162251.GA90882@afflictions.org> <87oesdcqcd.fsf@strauser.com> <20040205192132.GA11676@afflictions.org> <87brodco8c.fsf@strauser.com>

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Thus spake Kirk Strauser (kirk@strauser.com) [05/02/04 14:36]:
: > The PR (at quick glance) seems to bring up issue with 5.2-RC.  It also
: > states that PIO4 mode doesn't work.
: 
: At the end, PIO4 was in fact working and solid.  It was pretty flaky at the
: time I filed the PR, but stabilized somewhat afterward.

I had -RC on this machine, installed from JPSNAP the day before -RELEASE
was, well, released.

: > While my problem is still definitely with ATAng, I'm seeing very different
: > behaviour, and at different points in the tree, than you.  I can't even boot
: > in UDMA, but booting in PIO4 works just fine, even in a heavy load -- load
: > average at about 6, compiling jdk14, X11-4-libraries, and world at the same
: > time.
: 
: My gold standard was running Amanda backup.  During regular operation, when
: in a UDMA mode, I'd see a few intermittent warnings and a rare crash.  When
: I ran Amanda, my system would freeze - every time, guaranteed.  The same
: operations in PIO4 were slow but completely successfully.

I'm just finishing up a level 0 dump of all filesystems, and I'm running
pretty stable.  This isn't surprising, and it's in line with what you saw --
running under PIO4 is stable, UDMA100 is not.

Would it be worth it to try to force the system into UDMA66 or UDMA33?


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