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Date:      Wed, 10 Jul 2002 01:56:49 +0200
From:      Clement Laforet <sheep.killer@cultdeadsheep.org>
To:        stable@freebsd.org
Subject:   strange ATA behavior with -STABLE
Message-ID:  <20020710015649.0592a44a.sheep.killer@cultdeadsheep.org>

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Hi guys :)

I "recently" upgraded one of my server from 4.5 (RELENG_4_5) to stable (RELENG_4) on the 4th july (nearly 9am CEST).
And I noticed few hours ago, a little difference with the ata drivers.
I know they have changed but there is something which "disturbs" me.
Here a piece of log I have when "ATA failled". I don't know why. Disks seems to be ok, maybe the heat ;)
so... 

Jul  4 09:00:40 goofy /kernel: ad0: READ command timeout tag=0 serv=0 - resetting
Jul  4 09:00:40 goofy /kernel: ata0: resetting devices .. done
Jul  4 09:00:50 goofy /kernel: ad0: READ command timeout tag=0 serv=0 - resetting
Jul  4 09:01:10 goofy last message repeated 2 times
Jul  4 09:01:10 goofy /kernel: ata0-master: timeout waiting for command=ef s=00 e=00
Jul  4 09:01:10 goofy /kernel: ad0: trying fallback to PIO mode
Jul  4 09:01:20 goofy /kernel: ad0: READ command timeout tag=0 serv=0 - resetting

After this, the system was still up, even if I was unable to access ad0 and ad2, processes "simply became dead".
(system an 'sensible data' are on SCSI disks)
Without happiness, I deal with this ;)
This was before I upgrade ;)

I thought (bad ?) that upgrading to newer version of ata driver, allows me to reset ata buses, and repair this "on the fly".
I was wrong !
Now my FreeBSD system freezes.
The last console info is (like):
ad2: read command timeout tag=0 serv=0 - resetting
ata-1 resetting
*FREEZE*
and then hard reboot 
Nothing in syslog :)

And now the question :o)
Before considering what that happened (four times in 8hours today), I would like to know how I can trace this (kernel options, soft, daemon).
Or maybe I've done a bad things ;)

here's my uname -a :
FreeBSD goofy.cultdeadsheep.org 4.6-STABLE FreeBSD 4.6-STABLE #0: Thu Jul  4 10:05:12 CEST 2002     root@goofy.cultdeadsheep.org:/usr/obj/usr/src/sys/GOOFY  i386

here's my ata (standard) kernel conf :

device          ata0    at isa? port IO_WD1 irq 14
device          ata1    at isa? port IO_WD2 irq 15
device          ata
device          atadisk                 # ATA disk drives
device          atapicd                 # ATAPI CDROM drives
#device         atapifd                 # ATAPI floppy drives
#device         atapist                 # ATAPI tape drives
options         ATA_STATIC_ID           #Static device numbering


Thanks a lot in advanced, and I hope this "report" could be useful ;)

clem

PS: like other french people, sorry for my english ;) and sorry to post if I've done something bad ;)



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