Live upgrade issue with ZFS Root

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http://www.unix.com – I have created a solaris10 update9 zfs root flash archive for sun4v environment which i 'm tryin to use for upgrading solaris10 update8 zfs root based server using live upgrade. following is my current system status Code: lustatus Boot Environment Is Active Active Can Copy Name Complete Now On Reboot Delete Status -------------------------- -------- ------ --------- ------ ---------- zfsBE yes yes yes no - zfsBEu9 yes no no yes - when i try to upgrade the with luupgrade i get following error Code: luupgrade -f -n zfsBEu9 -s /mnt -a /flash/zfsBEu9.flar 63521 blocks miniroot filesy (HowTos)