Migration SAPDB from windows to HP-Unix

Hello Experts ,

Please help me how to migrate SAPDB 7.3.054 data from Windows 2000 to HP UNIX 11.11.

We are using SAPDB 7.3.54 version for content server 6.30.As per below note( 962019-System copy of MaxDB Content Server Storage)can i migrate SAP DB data or not .

Client requested us for the migaration content server 6.30+ SAPDB 7.3 on unix server and upgrade to 6.40 + Max DB 7.6 .

Any possiblity of direct backup/ restore. because it is an open database .

Thanks

Rajasekhar