Storage

Question 1

What is parallelism?

Answer 1

a way of performing parallel execution of an application on multiple processors

Question 2

What is RAID 0?

Answer 2

• Data is spread/striped across multiple disks.
• Data written to the drives alternates across the drives
• Not fault tolerance
• It improves read/write operations
• good for non-critical storage that needs fast read/write speeds

Question 3

What is RAID 1?

Answer 3

-Mirroring
- Data is copied onto more than one disk so they are exact duplicates
-If the primary drive fails, then the other take over
- Improves read performance as different blocks of data can be accessed concurrently
- slow writing performance
-Mission critical data

Question 4

What is RAID 5?

Answer 4

• requires three or more disks
• data is striped/spread across multiple disks
• Parity is stored evenly across the disks to rebuild data in case of a disk failure
• storage is greatly reduced because parity is stored
• can only handle up to a single disk failure
• most common set up

Question 5

What is RAID 10?

Answer 5

• a combination of raid 0 and raid 1

Question 6

What is NAS?

Answer 6

Network-attached storage
Centralized storage device for storing file-based data
Multiple hard drives in a raid configuration
It is attached to a network and can be accessed across the network
Uses the Ethernet network to send and receive files
Typically used in homes or small to medium-sized businesses
It has a single point of failure

Question 7

What is SAN?

Answer 7

A dedicated high-speed network that is used for data storage
It consists of multiple disk arrays, servers, and switches
The servers access the disk array, which is recognized as a local hard drive
Highly scalable as more storage space can be added
It is high speed as the devices are interconnected by fiber optics
It is relatively expensive
It is not affected by network traffic as they are basically a network all by itself

Question 8

What does RAID stand for?

Answer 8

Redundant Array of Independent Disks

Question 9

What are the different types of storage and their distinctions?

Answer 9

Direct attached storage that are directly connected to the computer you are using This could be hard drive drive disks (HDD), or a Solid State Drive, floppy disks or a USB.

Network-based storage like NAS or SAN.

Cloud Storage lets you store data off the site location and are able to access it though the internet

Question 10

What type of data can be stored in what type of storage?

Answer 10

File storage data is stored in files and the files are stored in folders using a hierarchy of directories and subdirectories. Good for organized and structured data.

Block storage- stores unstructured data. breaks your data into equally sized chunks and stores each block separately under a unique address and they can be stored anywhere in your system. Offers greater efficiency and faster performance.

Object storage-unstructured media; good for archiving data and data back ups.

Question 11

What is file storage?

Answer 11

data is stored in files and the files are stored in folders using a hierarchy of directories and subdirectories. Good for organized and structured data.

Question 12

What is object storage

Answer 12

Unstructured media; good for archiving data and data back ups.