Date: Sun, 15 May 2011 13:12:17 -0400 From: Marcel Moolenaar <marcel@xcllnt.net> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: svn-src-head@FreeBSD.org, "Andrey V. Elsukov" <ae@FreeBSD.org>, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r221952 - head/sbin/geom/class/part Message-ID: <9D0B1F3A-27C1-4CB8-B619-FF4C5F199802@xcllnt.net> In-Reply-To: <E2746EF4-47DD-48F7-A255-4BAF83736A5F@xcllnt.net> References: <201105151145.p4FBjDVR038539@svn.freebsd.org> <7B2294F7-8383-42F2-8127-759DBCD3540A@xcllnt.net> <4DCFF0D5.3080309@FreeBSD.org> <E2746EF4-47DD-48F7-A255-4BAF83736A5F@xcllnt.net>
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On May 15, 2011, at 12:59 PM, Marcel Moolenaar wrote: > > /* ... paging in non-commit details ... */ > > The point is that this is what's happening *now*. This is not > what happened before. With support for logical partitions (i.e. > the EBR scheme), the total partition bounds and the effective > usable space are not the same. This is because the partition > starts with an MBR look-alike. The usable space is therefore > 1 sector less and start at offset 1 (0-based) from the start > of the partition. /* ... compensate for data poisoning while paging in ... */ The usable space starts a *track* from the beginning of the partition as per standard MBR rules. Not 1 sector in... -- Marcel Moolenaar marcel@xcllnt.net
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