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Date:      Mon, 9 Aug 2004 21:35:58 +0200
From:      "Daniel Eriksson" <daniel_k_eriksson@telia.com>
To:        =?iso-8859-1?Q?'S=F8ren_Schmidt'?= <sos@DeepCore.dk>
Cc:        'Ville-Pertti Keinonen' <will+freebsd-current@will.iki.fi>
Subject:   RE: ATA driver races with interrupts
Message-ID:  <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAAG7js2UEMnUiOlsmfRkjucAEAAAAA@telia.com>
In-Reply-To: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAAwYmfRX4L1UOyqBRdAqv9HQEAAAAA@telia.com>

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I wrote:

> After 3+ days of uptime, including continuous SMART monitoring (which
> without patch triggers an immediate disconnect, and with S=F6rens =
patch
> triggered a disconnect after ~16 hours) and a fair amount of=20
> disc activity on both channels it looks like maybe the serialization
> patch from Ville-Pertti is enough to make my SATA controller work=20
> properly. Of course, it also slows things down, but right now that is
> better than the alternative.

Ha, so much for thinking it was stable. Earlier today (after 4+ days of
uptime) the machine disconnected one of the SATA discs despite the fact =
that
I'm running with Ville-Pertti's serialization patch.

I have two 250GB SATA discs, one Western Digital and one Maxtor. After
looking at the logs from today, and grep'ing some old logs, I noticed =
that
it seems more common for the channel with the WD disc to lock up. My =
logs
don't go back far enough that I can say it has always been like that, =
but it
looks that way from the logs right now (but I only switched channels for =
the
discs once, so the sampling is very limited and the result could be =
entirely
coincidental).

I have updated my system to sources from 2004.08.09.13.00.00 without any
patches (because I saw some commits to the ATA code in the last couple =
of
days). The base code now allows me to at least start the SMART monitor =
and
run some stress tests. I'll report back when/if it fails. By next week =
I'll
probably have a Promise SATA150 TX4 that I will use instead. It will be =
very
interesting to see if that one also will give me problems with the WD =
disc.

/Daniel Eriksson




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