Excessive (7) login failures for root: locking account.

when i use root try to connect system ,output line

Excessive (7) login failures for root: locking account.

and then i must in ldm primary connect ldm guest also error。

last i try to login with cdrom in Single user mode. Do the following:

1.edit shadow

# zpool import -R /mnt BIrpool-2

cannot mount '/mnt/BIrpool-2': failed to create mountpoint

cannot mount '/mnt/export': failed to create mountpoint

cannot mount '/mnt/export/home': failed to create mountpoint

# # zfs list

NAME                   USED AVAIL REFER MOUNTPOINT

BIrpool-2                89.3G  186G  106K /mnt/BIrpool-2

BIrpool-2@20130308             1K   -  106K -

BIrpool-2@20141121             1K   -  106K -