Chapter 1

1:	How much downtime is allowed per year to have five-nines availability?
A1:	Answer: 5 minutes
2:	Before SANs and NAS, what was DAS called?
A2:	Answer: It was simply called storage; there was nothing else to compare it to.
3:	DAS is used by which storage technologies?
A3:	Answer: SCSIand ATA
4:	True or false: DAS allows storage devices to be connected and disconnected while the system is operating.
A4:	Answer: False
5:	What is the relationship between host systems and storage using DAS?
A5:	Answer: One to many
6:	What is the relationship between host systems and storage using network storage?
A6:	Answer: Many to many
7:	True or false: Upgrading storage and servers is easier with network storage than it is with DAS.
A7:	Answer: True
8:	Where is storage located in a data-centric architecture?
A8:	Answer: In the middle