linux-kernel - Re: 2.6.24-rc3-mm1

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Date:	Thu, 22 Nov 2007 20:12:50 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Gabriel C <nix.or.die@...glemail.com>
Cc:	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: 2.6.24-rc3-mm1

On Fri, 23 Nov 2007 02:39:08 +0100 Gabriel C <nix.or.die@...glemail.com> 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.

> 
> 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.
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