3.3 Given a scenario, select and install storage devices

Question 1

A drive operating at this speed will experience about 5.5ms of this delay.

Answer 1

5,400rpm

Question 2

Drives at this speed experience about 4.16ms of latency (delay). A hard drive with this RPM has a sustained data transfer rate up to 1,030 Mbps. Rate depends on the track location. Rate will be higher for data on the outer tracks and lower toward the inner tracks.

Answer 2

7,200rpm

Question 3

Latency will decrease to about 3ms. Data transfer rates generally go up to with a higher rotational speed but are influenced by the density at the disk (number of tracks and sectors present in a given area).

Answer 3

10,000rpm

Question 4

Drives are higher end up drives and suffer only 2ms of latency. Generate more heat, requiring more cooling to the case. Offer faster data transfer rates for the same area density.

Answer 4

15,000 RPM

Question 5

Smaller hard drive for laptops

Answer 5

Form factor 2.5

Question 6

Larger size drive for desktop computers

Answer 6

Form Factor 3.5

Question 7

Open logical device interface specification for accessing nonvolatile storage media attached via a PCI express (PCIe) bus It allows host hardware and software to fully exploit the levels of parallelism in modern SSDs. Latest version is 2.0.

Answer 7

Non-volatile Memory Express
(NVMe)

Question 8

SATA Read notes and book

Answer 8

SATA read notes and book

Question 9

Uses a network of serial interconnects that operate high speed. Intended as replacement for AGP and PCI. Has ability to be faster than AGP while maintaining flexibility of PCI. Has 5 versions.

Answer 9

Peripheral Component
Interconnect Express (PCIe)

Question 10

Smaller form factor - No SATA data or power cables. Can use a PCI Express bus connection– 4 GB/second throughput or faster when using NVMe PCIe x4. Different connector types– Needs to be compatible with the slot key/spacer.

Answer 10

M.2

Question 11

Smaller form factor than SATA SSDs. Low power consumption.

Answer 11

mSATA

Question 12

Hard drives store huge amounts of important data
Hard drives are moving components– They will eventually break
What happens to the data when the drive fails?– You can prepare for that; Use an array of drives. Not a backup

Answer 12

Redundant Array of Independent
(or Inexpensive) Disks (RAID) 0,
1, 5, 10

Question 13

File blocks are split between
two or more physical drives– High performance– Data written quickly
No redundancy– A drive failure breaks the array.

Answer 13

RAID 0- Stripping

Question 14

File blocks are duplicated between
two or more physical drives
* High disk utilization– Every file is duplicated– Required disk space is doubled
* High redundancy– Drive failure does not affect data availability

Answer 14

RAID 1 - Mirroring

Question 15

File blocks are striped– Along with a parity block– Requires at least three disks
* Efficient use of disk space– Files aren’t duplicated, but space
is still used for parity
* High redundancy– Drive is available after a failure– Parity calculation may affect
performance

Answer 15

RAID 5 - Striping with parity

Question 16

The speed of striping, the
redundancy of mirrors
* Need at least 4 drives

Answer 16

RAID 10

Question 17

Flash memory– EEPROM (Electrically erasable programmable
read-only memory)– Non-volatile memory - No power required to retain data
Limited number of writes– Can still read the data
Not designed for archival storage– Easy to lose or damage - Always have a backup – Flash memory

Answer 17

Flash drives

Question 18

Flash technology is ideally suited for use not only with computers but also with many other things like digital cameras and Mp3 players.

Answer 18

Memory cards

Question 19

Small bumps read with a laser beam– Microscopic binary storage
Relatively slow– Archival media
Many different formats - CD-ROM, DVD-ROM, Blu-ray
Internal and external drives– For those uncommon application installations

Answer 19

Optical drives