Cannot import existing pool

[ksgsystem]

Hi everyone! I am very beginner to FREENAS & TRUENAS . i had problems with importing existing pool. please help me
I used FREENAS previously, this OS got corrupted so i installed a new TRUENAS in diffrent boot disk and connected my storage disk to new truenas machine
i tried to import old data pool though GUI == Storage -> Pools -> Import Pool ->
But it says error like

Error importing pool
('Integrity check failed',)

i also tried import using terminal by this commands

Code:

zpool import onetbshare
cannot import 'onetbshare': pool was previously in use from another system.
Last accessed by  (hostid=21ad8d40) at Sun Jan 31 04:49:35 2021
The pool can be imported, use 'zpool import -f' to import the pool.

Code:

zpool import -f onetbshare
        internal error: cannot import 'onetbshare': Integrity check failed
zsh: abort (core dumped)  zpool import -f onetbshare

What should i do to retrive my files from old data pool to back?

 

[JohnDigital]

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