Storage of Computers

Question 1

What is Storage?

Answer 1

It holds data, instructions, information

Question 2

What does storage do?

Answer 2

it records info to storage media

it retrieves info from storage media

Question 3

What are Hard Disk Drives? (HDD)

Answer 3

1. It is a mechanical non-volatile data storage

2. disc is coated with ferrous iron oxide

Question 4

How does HDD read?

Answer 4

The read/write heads float a few nanometer above the platter on a cushion of air

Question 5

what are the recording methods for Hard Disk?

Answer 5

Uses the horizontal/perpendicular direction

AKA N/S pole alignment

Question 6

How is HD compared to SSD?

Answer 6

HD has more capacity than SSD but is slower than SSD

Question 7

What is the formula to find total capacity?

Answer 7

No.sectors * (bytes/sector)

Question 8

How do you format a hard disk?

Answer 8

By dividing the disk into tracks and sectors so system can sore and locate data easily.

Question 9

What is a cylinder of Hard Disk?

Answer 9

Vertical section of track through all platters

Question 10

How does a Hard Disk work?

Answer 10

1. When software request disk access, the head will determine the current or new location of data.
2. The head will move to the location of the data and retrieve the info.

Question 11

What is Headcrash?

Answer 11

1. Occurs when the head touches the surface

2. Will cause permanent data lost

Question 12

What causes Headcrash?

Answer 12

A tiny strand of hair, dust

Question 13

What is a floppydisk?

Answer 13

Aka Diskette

Question 14

Is FloppyDisk good?

Answer 14

Its cheap and portable

Question 15

What is a disk controller?

Answer 15

Controls the transfer of data, instructions and information from a disk form system bus

Question 16

What does the disk controller consists of?

Answer 16

Consists of special purpose chip and electronic circuit

Question 17

What are some examples of disk controller?

Answer 17

1. SATA
2. EIDE
3. SCSI
4. SAS

Question 18

What is magnetic disk controller?

Answer 18

Chips and circuits that control transfer of items from disk

Question 19

How many types are there in magnetic disk controller?

Answer 19

Parallel and Series types

Question 20

Why is parallel arrangement bad?

Answer 20

1. Cables are messy in terms of parallel arrangement.

2. Prone to interference due to closeness of each other.

Question 21

why is SSD good/bad?

Answer 21

1. Fast access time
2. Fast Xfer time
3. Less heat and power
4. Low capacity

Question 22

How many types of Flash Memory Storage are there?

Answer 22

1. SSD
2. Memory Card
3. USB Thumbdrive
4. ExpressCard

Question 23

What is memory card?

Answer 23

1. SD Card/ Micro SD card, memory stick

2. Lifespan up to 100 years

Question 24

What is Flashdrive?

Answer 24

Aka thumbdrive

Question 25

Why is Flashdrive efficient?

Answer 25

Cheap and portable, but has limited capacity

Question 26

What is Cloud Storage?

Answer 26

Internet service provided for storage

Question 27

Why is cloud storage good?

Answer 27

1. Convenient to access via any computer

2. Able to store large files instantaneously

Question 28

What are optical disc?

Answer 28

Round, flat disc that is made up of metal, plastic and lacquer that is read by a laser beam.

Question 29

Why is Optical disc efficient?

Answer 29

It is split into sectors for easy info retrieve and has a lifespan of up to 100 years.

Question 30

What is a tape?

Answer 30

Magnetically coated ribbon of plastics capable of storing large amount of data at low cost

Question 31

What is magnetic stripe?

Answer 31

Thin microprocessor embedded inside a card to store information

Question 32

What is enterprise storage used for?

Answer 32

To store large amount of information records for big businesses