Date: Tue, 28 May 2013 19:03:42 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Lev Serebryakov <lev@FreeBSD.org> Cc: freebsd-geom@FreeBSD.org Subject: Re: Could gpart align MBR primary partiton at 4K? Message-ID: <alpine.BSF.2.00.1305281853480.49386@wonkity.com> In-Reply-To: <234552188.20130529021356@serebryakov.spb.ru> References: <234552188.20130529021356@serebryakov.spb.ru>
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On Wed, 29 May 2013, Lev Serebryakov wrote: > Hello, Freebsd-geom. > > I'm trying to format external Extended Format drive to FAT32 under > FreeBSD 9.1-STABLE > > I've created MBR scheme, but when I try to create primary partition > I get: > >> sudo gpart add -t fat32 -a 4k da0 > da0s1 added, but partition is not aligned on 4096 bytes >> > > Why? > > According to "Using Advanced disks for old OSes like WinCP" guides it > is possible to 4K-align MBR partition, but all these guides are > windows-centric... The MBR standard specifies alignment to cylinders. gpart complies with that. It's like -a always goes to 63. Other operating systems are not as strict, which at this point makes it easier for their users. As far as I know, the only way to align MBR partitions on FreeBSD is by entering manual values to fdisk(8).
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