Chapter 3: Storage devices and media

Magnetic storage media:

• store data magnetically
• store data on their surface
• storage media with no moving parts, based on electronic circuits and using flash memory
• there aren't right answers

Optical storage media:

• store data magnetically
• store data on their surface
• storage media with no moving parts, based on electronic circuits and using flash memory
• there aren't right answers

Solidstate media

• there aren't right answers
• storage media with no moving parts, based on electronic circuits and using flash memory
• store data on their surface
• store data magnetically

what is it?

• A hard disk
• A portable hard disk
• Memory card
• Memory stick

with such advantages what storage devices do you know?
very large, fast, low, fragile is moved, expensive

• fixed hard disks
• portable hard disks
• magnetic tapes
• Blu-ray

with such advantages what storage devices do you know?
large, fast, high, robust, medium

• Blu-ray
• CD
• Flesh memory cards
• Memory sticks

The disadvantages of memory cards.
Choose the correct answer

• they can break easily
• need very little power
• are available in many sizes
• are small, light and compact so are very easily portable

How data is stored in CD/DVD disks (Choose two options):

• Red laser lights is used to read and write data

• stores data in parallel tracks

• Uses blue laser to read and write data

• Data is stored in ‘pits’ and ‘bumps’ on the spiral track

Difference between Blu-Ray and DVDs (Choose two options):

• Smaller ‘pits’ and ‘bumps’ bigger storage , 5 times than DVD

• DVD have smaller storage size compared to Blu-ray

• Blu-Rays are used for high definition sound track only

• Comes with a secure encryption system

Two advantages of Blu-Ray compared to CD/DVD disks:

• Very fast data transfer rate

• Cheaper

• doesn't requires special player

• Data access speed is greater than other optical media