Date: Thu, 14 Feb 2013 17:08:27 +0000 From: "Robert N. M. Watson" <rwatson@FreeBSD.org> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: "freebsd-arch@FreeBSD.org Arch" <freebsd-arch@freebsd.org> Subject: Re: FDT on x86 and for non-fdtbus devices. Message-ID: <9E6F6629-BB8B-4DE9-8348-56516D9D4E97@FreeBSD.org> In-Reply-To: <E11BFB94-8653-44F5-A3B0-6951170A22A6@xcllnt.net> References: <03A622DA-EFD4-4984-8FC3-CD8B4832C32E@xcllnt.net> <alpine.BSF.2.00.1302141031480.65091@fledge.watson.org> <8606E19D-98A2-4E2C-A9E3-5056C1BAC34E@bsdimp.com> <B0375E90-369C-4F9C-AAB9-2106C7D68623@FreeBSD.org> <E11BFB94-8653-44F5-A3B0-6951170A22A6@xcllnt.net>
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On 14 Feb 2013, at 17:00, Marcel Moolenaar wrote: > I think it's a feature to instantiate GEOMs from the FDT. > Creating a mirrored disk configuration when the disks are > already in use cannot in general be done using tasting. > The assumption that the last sector is free is invalid > with GPT and it has created conformance problems for us > already. Being able to construct the gmirror GEOM from the > FDT eliminates the need to scribble meta-data on the disk > and as such allows us to mirror 2 GPT disks at the disk > level without instantaneously becoming non-conformant. Especially in our case, where the first block of the flash is definitely = reserved for things other than partition table data structures. :-) Robert=
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