Storage Devices

Question 1

Optical Format

Answer 1

• Small bumps read with a laser beam

- Microscopic binary storage

Question 2

Compact Disc ROM

CD-ROM

Answer 2

-700MB Capacity

Question 3

Digital Versatile Disc

DVD-ROM

Answer 3

• 4.7 Gigabytes (GB) for single layer

- 8.5 Gigabytes for dual layer

Question 4

Blu -Ray

Answer 4

• 25 Gigabyte for single layer

- 50 Gigabytes for dual layer

Question 5

Writing to Optical Media

Burners

Answer 5

• Don’t create bumps
  
  • They darken photosensitive dye

-Compact Disc - Rewritable (CD-RW)

• DVD Read & Rewritable (DVD-R / RW)
  
  • And Dual layer (DVD-R DL)

-Blu-Ray Disc Recordable (BD-R)

Question 6

Hard Disk Drive

HDD

Answer 6

-Consists of spinning platters spinning very quickly

Rotational Speed Average Latency
10,000 3ms

7,200 4.16ms

5,400 5.55ms

Question 7

HDD Parts

Answer 7

• Platter = Where memory is stored
• Spindle = Spins the platter(s)
• Actuator = Moves arm to specific location
• Arm = Holds the Head (Reader)
• Head = Used to write & read info on the platter

Question 8

Solid - State Drive

SSD

Answer 8

• Flash base memory
• No more moving parts
• Designed to replace HDD

Question 9

Solid -State Hybrid Drive

SSHD

Answer 9

• Has both spinning and SSD in a single device
• SSD caches the slower spinning hard drive
• Looks like a normal hard drive or SSD

Question 10

Hot-Swappable Drives

Answer 10

• Add or remove while system is running
• USB
• Firewire
• SATA, eSATA

Question 11

USB Flash Memory

Answer 11

• EEPROM = Electronically Erasable Programmable Read Only Memory
• Non-Volatile = no power is required
• Limited number of writes
• Not designed for archival storage

Question 12

Flash Memory

Answer 12

• USB Flash Drive
• Compact Flash (CF)
• Secure Digital (SD)
  
  • MiniSD
  • MicroSD

-xD - Picture card

Question 13

Tape Drives

Answer 13

• Magnetic tape
  
  • Sequential storage
• Various sizes
  
  • 100GB to multiple terabytes per cartridges

-Inexpensive long-term setup

• Linear Tape - Open (LTO)
  
  • The Ultrium form-factor