Date: Tue, 31 Jan 2017 15:01:33 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: Sergey Matveychuk <sem33@yandex-team.ru> Cc: freebsd-questions@freebsd.org Subject: Re: boot from second disk Message-ID: <alpine.BSF.2.20.1701311455250.54303@wonkity.com> In-Reply-To: <64cd6b60-f5e7-872c-b006-99db639d3e1b@yandex-team.ru> References: <64cd6b60-f5e7-872c-b006-99db639d3e1b@yandex-team.ru>
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On Tue, 31 Jan 2017, Sergey Matveychuk wrote: > I set up FreeBSD 11.0 on first disk and next I added second disk and I want > to do a mirror remotely. > I followed instructions on > https://www.freebsd.org/doc/handbook/geom-mirror.html > With one difference: I use GPT partitions gmirror(8) is incompatible with GPT. Both put their metadata at the end of a disk. There are ugly ways of mirroring partitions, but it is not worth it. Unless the disks are larger than 2TB, create an MBR/disklabel layout as shown in the Handbook. If the disks are larger than 2TB, use a ZFS mirror. If the first disk has been set up correctly with bootcode, that will all be mirrored to the second disk when the mirror is created. So the system will be able to boot from either disk.
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