What must be added to the library to meet the high availability requirement?

A customer has a requirement to add high availability to all systems in the data center. It has an IBM TS4500 Tape Library In use.

What must be added to the library to meet the high availability requirement?
A . Additional convenience I/O stations
B . Dual grippers
C . Dual accessors
D . Redundant Library Managers

Answer: C

Explanation:

When an optional second accessor is installed, the TS4500 tape library features high availability (HA) which enhances the library performance.

References: https://www.ibm.com/support/knowledgecenter/en/STQRQ9/com.ibm.storage.ts4500.doc/ts4500_ipg_dual_accessors.html