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Date: Tue, 16 Mar 2010 14:27:10 +0800
From: Thomas Chou <thomas@wytron.com.tw>
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To: James Bottomley <James.Bottomley@suse.de>
CC: Tejun Heo <tj@kernel.org>, Denys Vlasenko <vda.linux@googlemail.com>,
       Arnd Bergmann <arnd@arndb.de>,
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       Matthew Wilcox <matthew@wil.cx>, aschnell@suse.de, knikanth@suse.de,
       jdelvare@suse.de
Subject: Re: ATA 4 KiB sector issues.
References: <4B947393.2050002@kernel.org> <201003100046.24695.arnd@arndb.de>	 <1158166a1003100114j6ea329fbh84bfad65dcac90bf@mail.gmail.com>	 <4B9EED55.10201@kernel.org> <1268720060.21384.10.camel@mulgrave.site>
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On 03/16/2010 02:14 PM, James Bottomley wrote:
>
> The big problem is that 99% of the x86 systems out there still use the
> ancient msdos label for their boot disks, so aligning H/S going forwards
> will give us a nice "just works" for x86 boxes.
>
>    
The key issue is not "just work", but "performance". When unaligned, the 
write performance can be lower than 50% of the expected rate.

- Thomas