Date: Sun, 23 Oct 2011 13:53:50 +0200 From: Damien Fleuriot <ml@my.gd> To: James Coldwell <coldwelljames11@googlemail.com> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: Restore a ZFS mirror setup (GPT, ZFS-on-root) Message-ID: <C18DCCD2-6B5D-4DA5-9AE6-DF685E24A4AD@my.gd> In-Reply-To: <CAJWXFzNDn%2B6%2B0zoXFECk=1Jd7gOPWfKqJzKGA6PQjxhjA=D-Yw@mail.gmail.com> References: <CAJWXFzNDn%2B6%2B0zoXFECk=1Jd7gOPWfKqJzKGA6PQjxhjA=D-Yw@mail.gmail.com>
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On 23 Oct 2011, at 11:26, James Coldwell <coldwelljames11@googlemail.com> wr=
ote:
> Hello List,
>=20
> My Problem:
> My server wouldn't come back up after a reboot.
> It is a 8.2-RELEASE system, running a two-disk ZFS mirror setup.
> It is a dedicated box in a remote datacenter.
> I can boot up some linux-based rescue system.
>=20
> The way I installed FreeBSD on it was with mfsbsd, the zpool was
> created as such:
> set poolname=3D"z0"
> set dev1=3D"ad4"
> set dev2=3D"ad6"
> set swapsize=3D"4G"
> set zfssize=3D"300G"
> gpart delete -i 1 ${dev1}
> gpart delete -i 1 ${dev2}
> gpart destroy ${dev1}
> gpart destroy ${dev2}
> gpart create -s gpt ${dev1}
> gpart create -s gpt ${dev2}
> gpart add -b 34 -s 64k -t freebsd-boot ${dev1}
> gpart add -s ${swapsize} -t freebsd-swap -l swap0 ${dev1}
> gpart add -s ${zfssize} -t freebsd-zfs -l disk0 ${dev1}
> gpart add -b 34 -s 64k -t freebsd-boot ${dev2}
> gpart add -s ${swapsize} -t freebsd-swap -l swap1 ${dev2}
> gpart add -s ${zfssize} -t freebsd-zfs -l disk1 ${dev2}
> gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ${dev1}
> gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ${dev2}
> zpool create ${poolname} mirror /dev/gpt/disk0 /dev/gpt/disk1
>=20
> That worked perfectly for half a year.
> Suddenly, it wouldn't come back up after a reboot.
>=20
> What I want to do now is mount the filesystem and check for misconfigurati=
on.
> So I once again booted into the linux-based rescue system, dd'd mfsbsd
> onto the first disk (/dev/sda), booted it up.
> This FreeBSD-based system is called "prealpha".
> That's where I am now:
> prealpha# gpart show
> =3D> 0 976773168 ada0 BSD (466G)
> 0 16 - free - (8.0K)
> 16 65520 1 !0 (32M)
> 65536 976707632 - free - (466G)
>=20
> =3D> 34 976773101 ada1 GPT (466G)
> 34 128 1 freebsd-boot (64K)
> 162 8388608 2 freebsd-swap (4.0G)
> 8388770 629145600 3 freebsd-zfs (300G)
> 637534370 339238765 - free - (162G)
> prealpha# ls /dev/gpt/
> disk1 swap1
> The devices changed name from ad4/ad6 to ada0/ada1 because mfsbsd
> loads the ahci module now.
> I want to mount the zpool from ada1, and view/edit some configuration file=
s.
> After that, I want to restore the mirror setup with ada0 and ada1 and
> try to boot again.
>=20
> How do I do that?
> Any help would be appreciated, I probably forgot to mention vital
> details, I am in a bit of a panic right now.
> Please tell me if you need for details.
>=20
Did you try zpool import ?
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