zfs mounting issue.

[frank.weed at magi.bounceme.net]

Hi,

I am currently using Freenas (9.0-RC2 FreeBSD 9.0-RC2) with zfs v28.
Recently I had some issue with the usb disk that os was installed.  I
haved reinstalled the system and I tried to import the pool, but it
will hang the system after sometime.  If I reboot the system, it shows
that the pool is online but it is not mounted.  I issue the command
zfs mount datastore,  but it will cause the system to hang once again.
 I am more or less stumped on the issue.  Any advice or ideas on how I
can get around this would be helpful.

Thanks.