On Jun 25, 2009, at 4:02 AM, Anton Shterenlikht wrote:

GEOM: mirror/gm0: the secondary GPT table is corrupt or invalid.
GEOM: mirror/gm0: using the primary only -- recovery suggested.

You created the mirror after the GPT, which means you destroyed
the GPT backup header. gmirror uses the last sector on the disk
for metadata and that by itself is a cause for various problems.

It's better to use gmirror per partition.

#echo 'geom_mirror_load="YES"' >> /boot/loader.conf

Is /boot a symlink for /efi/boot?

GEOM_MIRROR: Device gm0 destroyed.

This is normal.

And when the system is rebooted, there is no /dev/mirror anymore.

You could run into a race condition between GPT and gmirror and
GPT winning (again the result of gmirror using the last sector
on a disk for metadata).

Alternatively, make sure gmirror got loaded at boot.


Marcel Moolenaar

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