Storage Devices

Question 1

Where are 2.5-inch HDDs most common?

Answer 1

Laptops and smaller devices

Question 2

Where are 3.5-inch HDDs most common?

Answer 2

Desktops and larger devices

Question 3

Where are 5.25-inch HDDs most common?

Answer 3

Optical drives, tape drives, and legacy floppy drives

Question 4

Platters

Answer 4

Metal or glass discs coated with a magnetic substance

Question 5

How does the actuator and read/write head access data?

Answer 5

Moving over sectors and tracks

Question 6

Tracks

Answer 6

Circular paths on the platter

Question 7

Sectors

Answer 7

Segments of tracks

Question 8

What size are most sectors?

Answer 8

Typically 512 bytes per sector

Question 9

Seek Time

Answer 9

Time required to locate data on the platter

Question 10

Revolutions Per Minute (RPM)

Answer 10

Determines speed and performance

Question 11

5400 RPM

Answer 11

Budget/low-end

Question 12

7200 RPM

Answer 12

Common in modern computers

Question 13

10,000 RPM

Answer 13

High-performance systems

Question 14

15,000

Answer 14

Rare due to cost and competition from SSDs

Question 15

Buffer size

Answer 15

Internal cache that improves performance

Question 16

Throughput calculations

Answer 16

Times the numerical value of the SATA speed by 100

Question 17

IDE/PATA

Answer 17

Legacy interface with 40-wire or 80-wire flat ribbon cables

Question 18

Narrow SCSI

Answer 18

40 Mbps

Question 19

Wide SCSI

Answer 19

320 Mbps

Question 20

SAS-1

Answer 20

3 Gbps

Question 21

SAS-2

Answer 21

6 Gbps

Question 22

SAS-3

Answer 22

12 Gbps

Question 23

SAS-4

Answer 23

22.5 Gbps

Question 24

Which versions of SATA are compatible with SAS in server environments?

Answer 24

SATAs 2 and 3

Question 25

2.5-inch SSD form factor

Answer 25

Used in laptops and smaller desktops as a replacement for HDDs

Question 26

1.8-inch form factor

Answer 26

Previously used in smaller laptops

Question 27

mSATA

Answer 27

used for adapter cards

Question 28

How does mSATA operate?

Answer 28

It uses combined data and power port on the motherboard

Question 29

RAID

Answer 29

Combines multiple physical hard disks into a single logical disk

Question 30

RAID 0

Answer 30

Striping with no redundancy

Question 31

RAID 1

Answer 31

Mirroring with full redundancy

Question 32

RAID 5

Answer 32

Data is striped across disks with parity information stored for redundancy

Question 33

RAID 10

Answer 33

Data is mirrored within two RAID 1 arrays, which are striped together

Question 34

How many disks does RAID 5 need?

Answer 34

A minimum of three

Question 35

How many disks does RAID 10 need?

Answer 35

A minimum of four

Question 36

Failure Resistant

Answer 36

Protects against data loss if a single disk fails

Question 37

Which RAID configurations are Failure Resistant?

Answer 37

RAID 1 and RAID 5

Question 38

Fault Tolerant

Answer 38

Continues functioning even if a component fails

Question 39

Which RAID configurations are Fault Tolerant?

Answer 39

RAID 1 and RAID 5

Question 40

Disaster Tolerant

Answer 40

Ensures access to data even if half of the RAID array fails

Question 41

Which RAID configuration is Disaster Tolerant?

Answer 41

RAID 10

Question 42

Which RAID configuration is best for high-speed applications?

Answer 42

RAID 0

Question 43

Which RAID configuration is best for FULL redundancy

Answer 43

RAID 1

Question 44

Which RAID configuration is best for redundancy with speed?

Answer 44

RAID 10

Question 45

Hot Swappable

Answer 45

Allows devices to be connected and removed without shutting down the system

Question 46

Do SATA devices support hot swapping?

Answer 46

Only when AHCI is enabled

Question 47

SD speed

Answer 47

Up to 25 MBps

Question 48

UHS-1

Answer 48

Up to 108 MBps

Question 49

UHS-2

Answer 49

Up to 312 MBps

Question 50

UHS-3

Answer 50

Up to 624 MBps

Question 51

Tape Drives

Answer 51

Magnetic tape storage for backups

Question 52

Standard tapes

Answer 52

140 GB

Question 53

LTO Ultrium tapes

Answer 53

Up to 3 TB

Question 54

USB 3.0 speed

Answer 54

5 Gbps

Question 55

USB 3.1 speed

Answer 55

10 Gbps

Question 56

USB 3.2 speed

Answer 56

20 Gbps

Question 57

USB 4 speed

Answer 57

40 Gbps

Question 58

eSATA II speed

Answer 58

3 Gbps

Question 59

eSATA II speed

Answer 59

6 Gbps

Question 60

CD storage

Answer 60

650 to 700 MB

Question 61

DVD standard storage

Answer 61

4.7 GB

Question 62

Dual-layer DVD storage

Answer 62

8.4 GB

Question 63

Standard Blu-ray storage

Answer 63

25 GB

Question 64

Dual-layer Blu-ray storage

Answer 64

50 GB

Question 65

How do CDs read?

Answer 65

An infrared light with a long wavelength

Question 66

How do DVDs read?

Answer 66

Red laser light with a medium wavelength

Question 67

How does Blu-ray read?

Answer 67

Blue laser light with a short wavelength

Question 68

Read-Only (ROM)

Answer 68

Pre-written discs; data cannot be modified

Question 69

Write-Once (R)

Answer 69

Data can be written once and not erased

Question 70

Write-Many/Erasable (RW/RE)

Answer 70

Data can be written, erased, and rewritten

Question 71

X-Rating

Answer 71

Multiplier of the base data rate

Question 72

CD X-Rating

Answer 72

1X = 150 KBps

Question 73

DVD X-Rating

Answer 73

1X= 1.385 MBps

Question 74

Blu-Ray X-Rating

Answer 74

1X = 4.5 MBps