unable to boot to FreeBSD 10.1-RELEASE-p31

Rao, Uthra R. (GSFC-672.0)[ADNET SYSTEMS INC] uthra.r.rao at nasa.gov
Fri Mar 18 15:38:40 UTC 2016

I updated my FreeBSD 10 system to 10.1-RELEASE-p31 and rebooted. The system is not booting. I see the following message on the screen:

ZFS: i/o error - all block copies unavailable
ZFS: can't read MOS of pool tank
gptzfsboot: failed to mount default pool

Please let me know how I can fix this issue.

Thank You.

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