A client is operating an 8Gb SAN of 130 ports utilizing the D2D4324 Backup System. The storage
arrays have multiple controllers visible and are presenting multiple LUNs. The client is complaining
about backups continually failing due to loss of I/O to the virtual tape libraries presented from the
D2D solution. What is the likely cause of this problem?

A.
The configured tape backup block size is less than 256KB.

B.
The number of concurrent backup streams exceeds recommendations.

C.
The switch is configured for host-centric zoning without splitting disk and tape.

D.
The port speed is forced to 4gb through the web interface on the D2D4324.

Explanation: