Ok,

So I issued the following command:

gbak "backupfilename" "databasefilename" -r -rep -user SYSDBA -pass
csib6admin

I end up with the following header.

Database header page information:
Flags 0
Checksum 12345
Generation 31
Page size 4096
ODS version 11.0
Oldest transaction 22
Oldest active 23
Oldest snapshot 23
Next transaction 24
Bumped transaction 1
Sequence number 0
Next attachment ID 0
Implementation ID 16
Shadow count 0
Page buffers 0
Next header page 0
Database dialect 1
Creation date Dec 14, 2006 17:09:04
Attributes force write, no reserve

Variable header data:
Sweep interval: 0
*END*

Still no reserve!! ?????