Date: Mon, 23 May 2011 15:09:34 -0500 From: "James R. Van Artsdalen" <james-freebsd-fs2@jrv.org> To: freebsd-geom@freebsd.org Subject: Re: [RFC] Remove requirement of alignment to track from MBR scheme Message-ID: <4DDABEFE.2020400@jrv.org>
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On 5/23/2011 4:55 AM, Andrey V. Elsukov wrote: > Now it is possible to create MBR partitions with exactly specified > start offset and size, and they will not be recalculated by kernel. If a partition is created this way, what will happen if the disk is then accessed by a FreeBSD kernel before this patch? If the result is that only newer kernels are supported by the patch, why not use GPT instead? Unaligned partitions is a "new" partition table feature, but I'm not sure how many decades "new" is in this case. Which other operating systems can read unaligned partitions (and which can't)? If the problem is that the kernel is making an undesirable geometry assumption then perhaps there needs to be a way to change that geometry assumption.
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