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Date:      Wed, 11 Sep 2002 07:09:09 +0200
From:      Grigori Goronzy <greg@chown.ath.cx>
To:        freebsd-stable@FreeBSD.org
Subject:   problem with ATA tagged queueing
Message-ID:  <20020911070909.26191379.greg@chown.ath.cx>

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I'm using two harddisks:
ad0: 14664MB <IBM-DJNA-351520> [29795/16/63] at ata0-master UDMA66
ad1: 78533MB <IC35L080AVVA07-0> [159560/16/63] at ata0-slave UDMA100

when I switch on tagged queuing by setting hw.ata.tags="1" in
loader.conf, the second disk gets tags(the first can't do this). It
firstly works, but after some time(2 days or so) I get some strange
messages, and the first disk is resetted to udma33, the second to pio4:

Sep  7 23:04:53 duron /kernel: ad1: READ command timeout tag=0 serv=1 -
resettin
g
Sep  7 23:04:53 duron /kernel: ad1: invalidating queued requests
Sep  7 23:04:53 duron /kernel: ata0: resetting devices .. ad0: DMA
limited to UD
MA33, non-ATA66 cable or device
Sep  7 23:04:53 duron /kernel: ad1: invalidating queued requests
Sep  7 23:04:53 duron /kernel: done
Sep  7 23:04:53 duron /kernel: ad1: no request for tag=0
Sep  7 23:04:53 duron /kernel: ad1: invalidating queued requests
Sep  7 23:05:03 duron /kernel: ad1: READ command timeout tag=0 serv=1 -
resettin
g
[...]
(these messages repeat very often)

But, the first strangeness, I'm using a ATA66(80pol) cable. I tried two
different cables so far.

I'm using
FreeBSD duron.hell 4.6.2-RELEASE FreeBSD 4.6.2-RELEASE #0: Mon Sep  2
16:23:46 CEST 2002     root@duron.hell:/usr/src/sys/compile/GENERIC 
i386

My motherboard is an ECS K7VZA with an VIA chipset
atapci0: <VIA 82C686 ATA100 controller> port 0xc000-0xc00f at device 7.1
on pci0
atapci0: Correcting VIA config for southbridge data corruption bug

I heard there are some tagge queueing related bugs in RELENG_4_6.. is
this true?

greg

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