RZTBL = RAM Zone Table
In reality the RAM Zone Table is the control lookup for the PDL (AKA Push Down List). The information inside this structure controls what
part of the PDL to use when building track maps or performing disk translations. There is a version of the table
recorded on the media and this is used to build the memory (or working) version of the table.
An example is the starting
position within the PDL for the defect list, for each DMZ (defect management Zone), and the size of the Push Down List for that zone.
Grown defects are also in the PDL
as well as inside the POL ( Push Off List)
Other than that I know nothing