Storage System Theory

Question 1

What is the translation for the DAS

Answer 1

Direct attached storage

Question 2

What is a direct attached storage?

Answer 2

Is a storage system, directly attached to a server or workstation. They are visible as discs/volumes by the client of us.

Question 3

What does NAS stands for?

Answer 3

Network attached storage

Question 4

What is a network attached storage?

Answer 4

It is a computer connected to a network that provides only file-based data storage services to other devices on the network and is visible as file server to the client OS

Question 5

What does SAN stands for?

Answer 5

Storage area networks

Question 6

What is a storage area network?

Answer 6

Are remote storage units that are connected to a PC using a specific networking technology and are visible as discs/volumes by the client OS

Question 7

What the main features of a DAS

Answer 7

Limited scalability

Complex manageability

Limited performance

Question 8

DAS does not necessarily means internal drives

True or false

Answer 8

True

Question 9

All the external discs, connected with a point to point protocol to a PC can be considered as DAS

True or false

Answer 9

True

Question 10

NAS systems do not contain one or more hard discs, often organized into logical, redundant, storage containers, or RAIDs

True or false

Answer 10

False

Question 11

NAS systems provide file access services to the hosts connected to a TCP/IP network through networked file systems/SAMBA

True or false

Answer 11

True

Question 12

What is the key difference between DAS and NAS

Answer 12

DAS is an extension of an existing server and is not necessarily networked

NAS is an easy and self-contained solution for sharing files over the network

Question 13

What is the main point of attention in a NAS regarding performance

Answer 13

Performance of NAS depends mainly on the speed and congestion of the network

Question 14

What is the main difference between NAS and SAN

Answer 14

NAS provides both storage and a file system

SAB Provides only block based storage and leaves file systems concerns on the client side

Question 15

What are the differences in the use of the NAS and SAB

Answer 15

NAS are used for low volume access to a large amount of storage by many users

SAN are used as a solution for petabites of storage and multiple, simultaneous access to files, such as streaming audio/video

Question 16

What are the application domain, advantages, and disadvantages of DAS, NAS, and SAN

Answer 16

See picture 5S in the Comp Infra album