Chapter 11

1:	Is multipathing more of a connecting (network) technology or a storing (SCSI) technology?
A1:	Answer: Storing
2:	What is the minimum number of HBAs needed for multipathing?
A2:	Answer: One if the HBAhas more than one port
3:	How many LUs can a single LUN be associated with?
A3:	Answer: One
4:	What is the difference between a WWNN and a WWPN?
A4:	Answer: WWNN represents the system or subsystem, and WWPN represents the port name.
5:	What three pieces of information define a path?
A5:	Answer: Initiator, WWPN+LUN, and LU
6:	True or false: Multipathing always uses active/passive configurations with static load balancing.
A6:	Answer: False. Active/active configurations are also used, along with dynamic load balancing.
7:	How long are typical timeout values for failing over?
A7:	Answer: 30 seconds to several minutes
8:	Describe the difference between mirroring, multipathing, and SAN routing.
A8:	Answer: Mirroring creates redundant data, multipathing provides multiple initiator-to-LU paths to access it, and network routing determines where transmission frames are forwarded in a SAN.
9:	What identifies the LU uniquely?
A9:	Answer: A serial number or UUID