Date: Fri, 26 Mar 2010 19:21:20 +0100 From: Dimitry Andric <dimitry@andric.com> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: Kirk McKusick <mckusick@mckusick.com>, freebsd-fs@freebsd.org, Andriy Gapon <avg@freebsd.org>, freebsd-geom@freebsd.org Subject: Re: g_vfs_open and bread(devvp, ...) Message-ID: <4BACFB20.6070601@andric.com> In-Reply-To: <20100326161539.GA10618@icarus.home.lan> References: <4BACB3F5.7010905@freebsd.org> <201003261528.o2QFSAuI037251@chez.mckusick.com> <20100326161539.GA10618@icarus.home.lan>
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On 2010-03-26 17:15, Jeremy Chadwick wrote: > I should note that they already have grown: Western Digital, as of a few > months ago, began shipping drives that use 4KByte sectors. ... > A discussion and an including an incredibly cheesy video review are > below. The video review does discuss the 4KB sector size, in addition > to jumpers that revert the drive to using 512-byte sectors for older > OSes such as Windows XP -- and presumably FreeBSD. Please note these drives *always* expose 512-byte sectors to any OS, at least for now. The jumper you refer to is only a hack to force sector 63 (the usual starting position for the first partition) to be aligned on a 4096-byte boundary. If you would remove it after partitioning, all sectors would shift up one sector, and there would be trouble. :)
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