What is required to implement Auto Image Replication?

Which two tasks should an administrator perform prior to upgrading NetBackup Appliances to version 3.1.2?
(Select two.)

An administrator has configured a Storage Lifecycle Policy (SLP) to protect a large number of clients which directs backups to Advanced Disk, then duplicates the images to tape. The administrator is experiencing an SLP backlog, which is causing backups to fail. The current values of key configuration settings are listed below:
Host Properties - Maximum data streams per client = 1
Policy Settings - Maximum jobs per policy = 20
Disk Pool Settings - Maximum I/O streams = 20
Storage Unit Settings - Maximum concurrent jobs = 20
Storage Unit Settings - Multiplexing level = 20
Which parameter should the administrator change to reduce the SLP backlog and allow the backups to complete successfully?

An administrator has a NetBackup Appliance that failed to CALL HOME during an unexpected hard drive failure. Which two reasons may have prevented CALL HOME from working? (Select two.)

An administrator took media server mediaA offline for maintenance and set up a new media server mediaB with access to the previously backed up data. When restores are performed for data that was backed up by mediaA, the restores fail.
Which setting must the administrator modify to allow successful restores?