Problem:
Syntax for back up to tape drive is not provided with InterBase 
Documents.

Solution:
IB V4.x
IB V5.x



Backup: 	gbak -b mydb.gdb /dev/rmt/0 <--Tape drive device name
Restore:	gbak -c /dev/rmt/0 mydb.gdb



d:ibbingbak -b -t -y gbak.out d:dbsmydb.gdb .tape0
-user "SYSDBA" -password "masterkey"