Date: Wed, 22 Jul 2009 22:33:14 -0500 From: Scot Hetzel <swhetzel@gmail.com> To: hartzell@alerce.com Cc: freebsd-current@freebsd.org Subject: Re: gptzfsboot doesn't like change (failure after swapping drives) Message-ID: <790a9fff0907222033t6393b725n59a9f7d8a38f32c9@mail.gmail.com> In-Reply-To: <19047.52443.164412.363239@already.local> References: <19047.52443.164412.363239@already.local>
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On Wed, Jul 22, 2009 at 9:37 PM, George Hartzell<hartzell@alerce.com> wrote= : > > I've been playing around with building an 8.0BETA2 system with > everything on a single zfs filesystem (I'll get fancier later) on a > zpool that is a 4 disk raidz. =A0I'm using GPT partitions and glabels so > that I can move the drives around w/out drama. > > Things work well, but if I swap a pair of drives then try to boot I > get the message that other folks have reported: > > =A0ZFS: i/o error - all block copies unavailable. > =A0ZFS: can't read MOS > =A0ZFS: unexpected object set type lld > =A0ZFS: unexpected object set type lld > > Then a couple of boot: prompts. > > If I boot off of the 8.0BETA2 media I can import the pool, even with > the drives in different slots. > > When I put the drives back into their original slots (verified by > booting the USB stick and checking with glabel status) I still can't > boot off of them, which surprised me a bit. > > Can anyone suggest something that I might be able to do to get a > system in this state to boot? =A0I've tried importing and exporting and > importing the pool several times. > I haven't tested this, but try the following: 1. boot the 8.0BETA install/fixit media 2. goto the fixit environment 3. Create /boot/zfs directory 4. load the kernel modules opensolaris.ko and zfs.ko 5. import the pool, and mount the root filesystem on /mnt 6. Copy /boot/zfs/zpool.cache to /mnt/boot/zfs 7. Reboot the system Scot
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