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Re: gmirror gm0 destroyed on shutdown; GPT corrupt Marcel Moolenaar Thu Jun 25 10:00:57 2009 


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

dev_taste(DEV,mirror/gm0)
g_part_taste(PART,mirror/gm0)

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.

FYI,

--
Marcel Moolenaar
[EMAIL PROTECTED]



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