Date: Thu, 8 Apr 2010 18:26:41 +0400 From: Alexey Tarasov <me@lexasoft.ru> To: =?iso-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>, freebsd-current@freebsd.org Cc: Alexey Tarasov <me@lexasoft.ru> Subject: Re: gpart and sector size Message-ID: <F3A5CE7A-894E-4A4C-80DB-7D418E66FA91@lexasoft.ru> In-Reply-To: <86mxxet437.fsf@ds4.des.no> References: <1A417529-F467-4411-970A-3FF41080AC61@lexasoft.ru> <868w8yukuy.fsf@ds4.des.no> <6313EB8E-D3DA-459F-A372-0E871359FA1C@lexasoft.ru> <86zl1et4rv.fsf@ds4.des.no> <F2541C05-A42C-486F-9709-56315C2F49FF@lexasoft.ru> <86mxxet437.fsf@ds4.des.no>
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> 1) There is already an ATA command to report both physical and logical
> sector sizes, but the disk lies - it always reports 512/512.
Advanced Format disks reports 512, but there is another command in ATA =
standard which can tell us if it uses 4k sector.
> 2) The disk may have already been formatted on a system that doesn't
> support 4k sectors, and may contain unaligned partitions and file
> systems, which won't be visible if we forcibly and unconditionally
> use 4k sectors.
I mean that when I create *NEW* GPT scheme I can set up sector size =
emulation.
It will never touch existing unaligned partitions.
--
Alexey Tarasov
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