Date: Sun, 30 Sep 2012 21:06:57 +0200 From: Raoul MEGELAS <rmgls@free.fr> To: "Andrey V. Elsukov" <ae@FreeBSD.org> Cc: freebsd-current@freebsd.org Subject: Re: gpart on macbook air Message-ID: <20120930190658.82A69D480FF@smtp5-g21.free.fr>
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On Sun, 30 Sep 2012 21:43:50 +0400 "Andrey V. Elsukov" <ae@FreeBSD.org> wrote: > On 30.09.2012 20:37, Raoul MEGELAS wrote: > > i installed CURRENT on a macbook air > > (internal ssd as you know): > > i noticed the following: > > > > 1. on freebsd, deleting a partition with gpart: say > > gpart delete -i 4 ada0 > > dammage the osx boot. > > of cours, booting with a backup disk and repairing the disk > > make it functional again. > > any light woukd be appreciated on this topic. > > Hi, > > When you are deleting a partition, the kernel completely overwrites the > partition table and PMBR area. You can compare first 34 blocks before > deletion and after to see what is going on. > > -- > WBR, Andrey V. Elsukov Hi Andrey, I can understand that, but i would have thought that the deletion of the concerned partition was written preserving others??? something like: - read the gpt table - find the offset - zeroes the partition entry - rewrites the table? is not that logic? if it is not so, i does not understand this behaviour. Thanks. raoul rmgls@free.fr
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