Chapter 3


1:

What are the two main performance areas in storage networks?

A1:

Answer: Bandwidth and latency

2:

True or false: DAS storage is less reliable than network storage.

A2:

Answer: False. DAShas historically been extremely reliable.

3:

Which of the following is not part of the software used in the I/O path: file system, volume manager, storage resource manager, multipathing drivers, or SCSI driver?

A3:

Answer: Storage resource manager

4:

What are the two layers most HBAs need?

A4:

Answer: SCSIapplication layer driver and network driver

5:

Name the host system hardware components in the I/O path.

A5:

Answer: System processors, system memory, memory bus, I/O bus, and host bus adapter

6:

What is flow control used for?

A6:

Answer: It adjusts the data rate of data being transmitted by a network node.

7:

Name the subsystem hardware elements found in the I/O path.

A7:

Answer: Network port, storage controller, cache memory, storage interconnect, storage device, and storage media

8:

True or false: Storage controllers in subsystems are the same as host system HBAs.

A8:

Answer: False. They have different logic to handle different types of tasks.

9:

True or false: File systems and operating systems do not have to be from the same vendor.

A9:

Answer: True. Installable file systems have worked very successfully for many years.

10:

True or false: The volume manager usually writes I/Os directly to disk device drivers.

A10:

Answer: False. The operating system kernel does this.



Storage Networking Fundamentals(c) An Introduction to Storage Devices, Subsystems, Applications, Management, a[... ]stems
Storage Networking Fundamentals: An Introduction to Storage Devices, Subsystems, Applications, Management, and File Systems (Vol 1)
ISBN: 1587051621
EAN: 2147483647
Year: 2006
Pages: 184
Authors: Marc Farley

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