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CompTIA A+ 1101 MGM > Select and Install Storage Devices > Flashcards

Select and Install Storage Devices Flashcards

3.3 Given a scenario, select and install storage devices.

1
Q

Storage devices that hold data when the system is powered off

A

Non-volatile storage devices

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2
Q

What are the 3 types of mass storage technologies?

A

magnetic, optical, or solid-state technology

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3
Q

A mass storage device installed as an internal component

A

Fixed disk

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4
Q

Allows you to fit a drive of a different size to the bay

A

Adapter caddy

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5
Q

What are the standard widths of storage devices?

A

5.25 inches, 3.5 inches, and 2.5 inches

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6
Q

uses flash memory technology to implement persistent mass storage; Risks from total failure of the device due to mechanical shock and wear are generally lower. Costs per gigabyte have fallen rapidly in the last few years

A

Solid-state drive (SSD)

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7
Q

evenly distribute writing on all blocks of an SSD to optimize the life of the device

A

wear leveling

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8
Q

Form factor communications interface with 600 MBps to plug in an SSD to a combined data and power port

A

mSATA

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9
Q

What is the transfer rate to a SSD?

A

6.7 GB/s

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10
Q

stores data on metal or glass platters that are coated with
a magnetic substance. The top and bottom of each platter is accessed by its own read/write head, moved by an actuator mechanism. The platters are mounted on a spindle and spun at high speed. Each side of each platter is divided into circular tracks, and a track contains several sectors

A

Hard disk drive (HDD)

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11
Q

What is the capacity of a sector on an HDD?

A

512 bytes

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12
Q

What are the average speeds of an HDD in rpm?

A

7,200 or 5,400 rmp

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13
Q

What are the speeds of a high performance HDD?

A

15,000 or 10,000 rpm

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14
Q

What are the two main form factors for HDDs?

A

3.5” for desktop PCs; 2.5” for laptops and as external drives

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15
Q

To mitigate the risks of data loss, the disks that underpin the mass storage system can be provisioned as this type of drive configuration

A

redundant array of independent disks (RAID

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16
Q

Drive configuration that divides data into blocks and spreads the blocks in a fixed order among all the disks in the array. This improves performance as multiple disks are available to service requests in parallel; aka striping without parity

A

RAID 0

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17
Q

How many disks does a RAID 0 drive configuration need?

A

at least 2 disks

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18
Q

What is the logical volume size of a RAID 0 drive configuration?

A

the total of the smallest capacity physical disk

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19
Q

a mirrored drive configuration using two disks; Each write operation
is duplicated on the second disk in the set, introducing a small performance overhead. A read operation can use either disk, boosting performance somewhat. This strategy is the simplest way of protecting a single disk against failure. If one disk fails, the other takes over

A

RAID 1

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20
Q

What is the disk utilization for a RAID 1 configuration?

A

50%

21
Q

Error correction information is spread across all the disks in the
array of a RAID

A

Distributed parity

22
Q

Uses striping but with distributed parity; Stripe sets with parity offer
the best performance for read operations

A

RAID 5

23
Q

How many disks does a RAID 5 require?

A

Minimum of 3

24
Q

A logical striped volume configured with two mirrored arrays; offers excellent fault tolerance

A

RAID 10

25
Q

How many disks does a RAID 10 configuration require?

A

Minimu of 4, and must be an even number

26
Q

What is the disk utilization for a RAID 10 configuration?

A

50%

27
Q

Can refer either to a storage device that can be moved from computer to computer without having to open the case or to storage media that is removable from its drive

A

Removable storage

28
Q

Enclosures connected directly to a network rather than to a PC

A

Network attached storage (NAS)

29
Q

What is the maximum capacity for an original SD card?

A

2 GB

30
Q

What is the maximum capacity for an SDHC?

A

32 GB

31
Q

What is the maximum capacity for an SDXC?

A

2TB

32
Q

What is the speed of the original specification SD card?

A

up to 25 MBps

33
Q

What is the speed of the UHS SD card?

A

up to 108 MBps

34
Q

What is the speed of the UHS-II SD card?

A

up to 156 MBps full-duplex or 312 MBps half-duplex

35
Q

What is the speed of the UHS-III SD card?

A

FD 312 MBps and FD 624 MBps

36
Q

Storage drives that use a laser to read the data encoded on the disc surface

A

Optical drives

37
Q

Type of optical drive that can be written to once only in a single session

A

Basic recordable media

38
Q

Type of optical drive that can be written to in more than one session, but data cannot be erased

A

Multisession recordable media

39
Q

Type of optical drive that can be written and erased in multiple sessions, up to a given number of write cycles

A

Rewritable media

40
Q

What is the maximum capacity of a CD, available in both recordable (CD-R) and rewritable (CD-RW) formats

A

700 MB

41
Q

What is the base transfer rate of a CD

A

150 KBps

42
Q

What is the capacity of single layer, single sided disc DVD?

A

4.7 GB

43
Q

What is the capacity of a dual-layer, double-sided disc DVD?

A

17 GB

44
Q

What is the base transfer rate for a DVD?

A

1.32 MBps

45
Q

What is the capacity of a Blu-ray disc?

A

25 GB per layer

46
Q

What is the base speed for a Blu-ray?

A

4.5 MBps, maximum theoretical rate is 16x (72 MBps)

47
Q

means that a disc can only be used on a player from the same region

A

Region coding

48
Q

True or false? A solid-state drive (SSD) attached to an M.2 port must be using the non-volatile memory host controller interface specification (NVMHCI) or NVM Express (NVMe).

A

False. M.2 is a physical form factor and can support both SATA and NVMe interfaces.

CompTIA A+ 1101 MGM (7 decks)

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