Date: Mon, 25 Aug 2014 19:02:44 +0400 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: Craig Rodrigues <rodrigc@freebsd.org>, John-Mark Gurney <jmg@funkthat.com>, freebsd-current Current <freebsd-current@freebsd.org> Subject: Re: mkimg used to create gpt image, problem booting Message-ID: <53FB5014.40402@yandex.ru> In-Reply-To: <B44B1E51-0F9E-41ED-B37F-DA2A9E6334FC@xcllnt.net> References: <CAG=rPVeucq%2BsMxe_NPe3Og939o=Sg4WGfYL7PjA1uXGU8uL=8g@mail.gmail.com> <853B0396-2C19-49DF-A8E8-8EB43D107597@xcllnt.net> <CAG=rPVes3Eq87hOE6W135yGvzRiAzHTbCGSxiyd0JBAs2ufqmA@mail.gmail.com> <7CE168C1-6AF3-4AD2-80DB-192AEC49FD2B@xcllnt.net> <CAG=rPVfe6pP08WWaYQ6enk7A6AkT3dBXVxNfK0JgJPaN_rJ_Uw@mail.gmail.com> <CAG=rPVe8Lh=P2MUdycM7%2B2mpSBPhe%2BkTvxR_bjnZfB1EkvK92Q@mail.gmail.com> <53F9AC50.1000000@yandex.ru> <CAG=rPVctN4-UBxRzWhEoEt5e_4d8UXCa0O40LZUHnS5Qj9hFeA@mail.gmail.com> <82000B55-10E5-4348-9F35-38962965A63C@xcllnt.net> <CAG=rPVeLgOGXx8=S18u03JuNGB9PzYk3uYZS8r=sgu3b_UHOmQ@mail.gmail.com> <20140824233143.GQ71691@funkthat.com> <3AC10D0D-2BD8-4D30-A033-7EE9D923F408@xcllnt.net> <53FAEA31.1070108@yandex.ru> <B44B1E51-0F9E-41ED-B37F-DA2A9E6334FC@xcllnt.net>
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On 25.08.2014 18:40, Marcel Moolenaar wrote: >> Also, now FreeBSD 11.0 uses different first usable LBA. By default it is >> 4k aligned. And this creates some incompatibility with older versions. >> You can't do `gpart restore` and get the same table, as you had on older >> system. > > It sounds restore is broken then. The restore command > cannot ever assume anything about the GPT. Including > the tool that created the GPT. In order to restore a > GPT, it must be properly backed-up. The backup header > and table should suffice most of the time for that > purpose as it's a replica, but as soon as meta-data is > missing and the restore command has to guess, things > will go wrong. `gpart restore` just uses a number of commands to geom_part(4) to create partition table similar to what was backed up. If your partition table on the old system had a partition that starts from LBA 34, now `gpart create` isn't able to create such partition table. Because by default the first usable LBA is 40. -- WBR, Andrey V. Elsukov
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