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DateTue, 20 Mar 2007 11:33:11 +0100
FromStefan Priebe <>
SubjectRe: Kernel 2.6.20 does not work anymore with SCSI or SATA on old Opteron / Xeon servers
Hello!

Here are more informations... the problem seems to be a little bit more
special.

1.) I've bootet these systems through NFS and would like to access
/dev/sda or /dev/sdb then. For example via fdisk and this does not work.

2.) I've now tested the following kernels -
2.6.18.8 - works
2.6.19.7 - works
2.6.20 - does not work
2.6.21-rc4 - does not work

3.) The funny thing is, i can boot the whole system via 2.6.18.8 for
example - fdisk the harddisk and format it + plus copying the whole
image with a 2.6.20.3 kernel - and then the Server installied works
perfectly i also can fdisk /dev/sdb or so. It only does not work if the
system itself is bootet via NFS...

Stefan

Andrew Morton schrieb:
> On Sun, 18 Mar 2007 21:50:46 +0100 Stefan Priebe <stefan@prie.be> wrote:
>
>> Hello!
>>
>> We've a very strange Problem with Kernel 2.6.20.x
>>
>> If i try to access a SCSI or SATA Disk (tested with Adaptec U320
>> ASC-29320, ICP Vortex 9024, Promise TX300) the whole server hangs - no
>> output - no error on the screen - but it hangs completely. But it does
>> not happen on all our systems affected are only old 604pin xeons and
>> socket 940 Opterons. Socket F Opteron or 771 Xeons does work fine.
>>
>> I've also testet apci=off pci=routeirq but both does not help. The
>> systems work fine with 2.6.19.x and before.
>
> Well that's a bit sad.
>
> Could you please set up netconsole
> (Documentation/networking/netconsole.txt) and add initcall_debug to the
> kernel boot command line and then send us the full bootup logs?
>
> (Even better: serial console with earlyprintk).
>
> If that doesn't shed any light, we might have to ask you to perform a
> git-bisect search to find the buggy commit, I'm afraid.

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