This feature provides an upgrade to the Model A60 Controller to This feature provides an update to the microcode of an installed
support application performance and capacity enhancements. It can be
added to any Model A60 without feature #9520 that was shipped prior to
October 12, 2001 without this capability.
3590 Model A60 Controller and the attached tape drives to provide
the latest level of functional microcode firmware support.
Newer microcode levels may be required when adding new functions.