Date: Tue, 22 Nov 2016 10:37:19 -0500 From: Anton Yuzhaninov <citrin+bsd@citrin.ru> To: freebsd-questions@freebsd.org Subject: Re: replacing bootloader wipes disk? Message-ID: <c11dcecb-cb62-fa2a-7655-c22dfc9f0c43@citrin.ru> In-Reply-To: <CAA0uU3UNzc89tGKQs658=y1N_hb1705rWYHBP1gGt8udUD_K0Q@mail.gmail.com> References: <CAA0uU3UNzc89tGKQs658=y1N_hb1705rWYHBP1gGt8udUD_K0Q@mail.gmail.com>
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On 11/22/16 00:09, Mark Moellering wrote: > fdisk -B -b /boot/boot0 /dev/ada0 > and boot0cfg -B ada0 > > > When I checked the drive this evening, it appeared to be completely > blank, except for a bootloader. I am not good enough with fdisk to > tell but could these commands have erased the drive? They don't look > like they would but fdisk is not something I use much... Any help is > greatly appreciated 1. fdisk should not erase the drive, in the worst case it can corrupt partition table. 2. It was better to see gpart show (and may be make gpart backup) before reinstalling bootloader. If disk had a GPT partition table then gpart command should be used. And even with MBR partitions your can use gpart: geom part bootcode -b /boot/mbr /dev/ada0
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