an external hard disk was protected with bitlocker and formated by mistake
now how to recovery data out of this
thanks

repair-bde.exe should be able to find metadata and decrypt the volume (what's left of it) if metadata is still on the volume. If metadata is gone - data is unrecoverable, unless you have original recovery key (not the recovery password) on a USB drive

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SAN, NAS, RAID, Server, and HDD Data Recovery.

Respected Doomer ,
In My Case The Client Has First Formatted That Partition In Windows [ Quick Format i Belive ] ,Then Dumped 23GB Data on a 193GB Partition .He Has The Password ,The Recovery Key I need To Ask Him .If There is a Copy of Metadata at the end on this drive or after 23GB i might be in luck otherwise i think Case lost

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Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com