In the past, attachment of the 3584 tape library to a System z
host required installation of the 3953 Library Manager. Starting with
the 3592 Model C07 tape control unit, the library management functions
that had been provided by the 3953 Library Manager (3953 Model L05)
are integrated into the 3592 Model C07. 3592 Model C07 control units
in a 3584 logical library partition will operate in a client/server
model with the ability for two of the tape control units (for redundancy)
to be able to run as servers providing the equivalent 3593 Library
Management functionality. The two Library Manager enabled control
units form a highly available pair. One tape control unit can fail
or be brought down for a code upgrade, and the other control unit
will still be able to handle library requests. However, only one of
the two Library Manager enabled control units will actively handle
library requests at any given time. The other Library Manager enabled
control unit will run in standby mode ready to takeover should the
primary control unit fail. Also note that the 3592 Model C07 will
not be able to coexist in the same 3584 logical library partition
with a 3953 Library Manager or with any of the older tape control
units (3592 Model C06 or 3592 Model J70). From a host perspective,
each 3584 logical library partition in a 3584 tape library appears
as a separate library to the host. With the addition of a 3592 Model
C07, into an existing 3584 library, an additional 3584 logical library
partition will need to be created to segregate any 3592 Model C07
control units from the older tape control units (J70 and C06) and
partitions that have a 3953 Library Manager. The 3592 Model C07 control
unit will support attachment of the 3592 Model E05, E06 and E07 tape
drives. For additional information refer to the 
IBM
Knowledge Center at http://www-01.ibm.com/support/knowledgecenter/STCTNLZ/welcome
.