Recovering lost password with ZFS mirrored root

Hi managers,

The sysadmin responsible for our zfs systems just left. WE don't have
passwords to them, I tried following Sun's documentation here:
http://docs.sun.com/app/docs/doc/817-2271/zfsboot-1?l=en&a=view
and booted to failsafe mode, but was unable to zap out the shadow file
entries, see below:


#boot -F failsafe

ROOT/zfsBE was found on rpool.
Do you wish to have it mounted read-write on /a? [y,n,?] y
mounting rpool on /a
cannot mount '/a/mnt': failed to create mountpoint
Unable to mount rpool/ROOT/zfsBE as root

Starting shell.


#zfs list

rpool /a/rpool
rpool/ROOT /a/rpool/ROOT
rpoot/ROOT/zfsBE /a/mnt
rpool/ROOT/zfsBE@zfsBE -
rpool/ROOT/zfsBE0 /a/rpool/ROOT/zfsBE0
rpool/dump -
rpool/export /a/export
rpool/export/home /a/export/home
rpool/swap -

#zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
rpool 34.5G 5.6G 28.9G 20% ONLINE /a



I'll try booting rom CD next.......please give any suggestions etc.
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