Andrew Morton wrote:
> On Fri, 23 Nov 2007 02:39:08 +0100 Gabriel C <[email protected]> wrote:
>
>> I have some warnings on each SCSI disc:
>>
>>
>> ...
>>
>> [ 30.724410] scsi 0:0:0:0: Direct-Access SEAGATE ST318406LW 0109 PQ: 0 ANSI: 3
>> [ 30.724419] scsi0:A:0:0: Tagged Queuing enabled. Depth 32
>> [ 30.724435] target0:0:0: Beginning Domain Validation
>> [ 30.724446] target0:0:0: Domain Validation Initial Inquiry Failed <--
>> [ 30.724572] target0:0:0: Ending Domain Validation
>> [ 30.729747] scsi 0:0:1:0: Direct-Access FUJITSU MAH3182MP 0114 PQ: 0 ANSI: 4
>> [ 30.729754] scsi0:A:1:0: Tagged Queuing enabled. Depth 32
>> [ 30.729771] target0:0:1: Beginning Domain Validation
>> [ 30.729780] target0:0:1: Domain Validation Initial Inquiry Failed <--
>> [ 30.729908] target0:0:1: Ending Domain Validation
>>
>
> Don't know what would have caused that. But yes, something is wrong in
> scsi land.
Actually I'm lucky the author didn't fix that FIXME in scsi_transport_spi.c and I still can boot ;)
>
>> no idea whatever this is related but buffered disk reads are 2.XX MB/sec and the box is somewhat laggy.
>>
>> hdparm -t on sda and sdb reports :
>>
>> /dev/sda:
>> Timing buffered disk reads: 8 MB in 3.26 seconds = 2.46 MB/sec
>>
>> /dev/sdb:
>> Timing buffered disk reads: 8 MB in 3.56 seconds = 2.25 MB/sec
>>
>> My IDE discs are fine.
>>
>> Please let me know if you need my config or any other informations.
>>
>
> And you're the second to report very slow scsi throughput in 2.6.24-rc3-mm1.
>
I found the commit which cause these problems , it is in git-scsi-misc patch and reverting it fixes both problems for me.
http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-misc-2.6.git;a=commitdiff_plain;h=8655a546c83fc43f0a73416bbd126d02de7ad6c0;hp=5bc717b6bdaaf52edf365eb7d9d8c89fec79df5d
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