GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable"

Matt Reimer mattjreimer at
Fri Nov 13 01:12:09 UTC 2009

2009/11/12 Matt Reimer <mattjreimer at>:
> Radek,
> Try the attached patch (sponsored by VPOP Technologies). I found an
> overflow in /sys/cddl/boot/zfs/zfssubr.c:vdev_raidz_read() that was
> causing my 6x1TB raidz2 array to fail to boot.
> Apply the patch, build everything in /sys/boot, and then make sure you
> update both gptzfsboot and /boot/loader.

Oops, here's the patch.

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