From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Ornati Subject: Re: Testers needed - Maxtor performance degradation Date: Thu, 6 May 2010 20:32:50 +0200 Message-ID: <20100506203250.76f559cd@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ww0-f46.google.com ([74.125.82.46]:61197 "EHLO mail-ww0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752584Ab0EFSc5 (ORCPT ); Thu, 6 May 2010 14:32:57 -0400 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Mikulas Patocka Cc: linux-kernel@vger.kernel.org, dm-devel@redhat.com, linux-scsi@vger.kernel.org On Thu, 6 May 2010 12:15:58 -0400 (EDT) Mikulas Patocka 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