linux-kernel - Re: Testers needed - Maxtor performance degradation

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Message-ID: <20100506203250.76f559cd@gmail.com>
Date:	Thu, 6 May 2010 20:32:50 +0200
From:	Paolo Ornati <ornati@...il.com>
To:	Mikulas Patocka <mpatocka@...hat.com>
Cc:	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	linux-scsi@...r.kernel.org
Subject: Re: Testers needed - Maxtor performance degradation

On Thu, 6 May 2010 12:15:58 -0400 (EDT)
Mikulas Patocka <mpatocka@...hat.com> wrote:

> I'd like to ask other people with Maxtor disks to run this script (with 
> "sda", "sdb", etc. as an argument ... without "/dev/" prefix). The script 
> measures read rate as a function of request size. Report the results, so 
> that it can be determined which disks are buggy and which not and the 
> default transfer size could be reduced to 256kB for the buggy ones.

ATA MAXTOR STM316021 3.AA
64 kB: 78.9 MB/s
128 kB: 79.1 MB/s
192 kB: 79.1 MB/s
256 kB: 78.6 MB/s
320 kB: 79.1 MB/s
384 kB: 78.9 MB/s
448 kB: 79.0 MB/s
512 kB: 79.1 MB/s
576 kB: 79.0 MB/s
640 kB: 79.1 MB/s
704 kB: 79.0 MB/s
768 kB: 79.1 MB/s
832 kB: 79.0 MB/s
896 kB: 79.0 MB/s
960 kB: 79.1 MB/s
1024 kB: 78.8 MB/s

-- 
	Paolo Ornati
	Linux 2.6.34-rc6-00063-gbe1066b on x86_64
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