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Date: Thu, 6 May 2010 17:23:31 +0100 From: Tvrtko Ursulin <tvrtko.ursulin@...hos.com> To: Mikulas Patocka <mpatocka@...hat.com> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "dm-devel@...hat.com" <dm-devel@...hat.com>, "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org> Subject: Re: Testers needed - Maxtor performance degradation On Thursday 06 May 2010 17:15:58 Mikulas Patocka wrote: [snip] > 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. Here is one: MAXTOR ATLAS10K5_073SAS BP00 64 kB: 86.7 MB/s 128 kB: 86.6 MB/s 192 kB: 86.6 MB/s 256 kB: 86.1 MB/s 320 kB: 39.9 MB/s 384 kB: 41.1 MB/s 448 kB: 41.3 MB/s 512 kB: 44.2 MB/s 576 kB: 49.7 MB/s 640 kB: 42.8 MB/s 704 kB: 47.0 MB/s 768 kB: 46.4 MB/s 832 kB: 59.1 MB/s 896 kB: 55.6 MB/s 960 kB: 57.2 MB/s 1024 kB: 59.3 MB/s Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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