8. Storage device

Task 1.

Tuning-in
Study these rules for CD-ROM and floppy disk care. Tick (♫) things to do and cross (♠) things not to do. Then compare your choice with a partner.

♫ Hold a CD-ROM by the edges
♫ Keep the optical/silver side of a CD-ROM clean
♠ Smoke when you use your CD-ROM drive
♠ Put floppy disks near a magnet
♫ Keep disks away from the sun and excessive heat.
♠ write the contents on the label on you floppy disk
♠ Put extra labels on floppy disks
♠ Remove by force a disk stuck in the drive
♠ Remove a disk when the drive light is on

Task 2.

Study this diagram of a hard disk drive. Match these labels to the diagram.

e. drive motor
d. sealed case
c. disks
b. read/write heads
f. head motor
a. gap between disks

Task 3.

Listen to part 1 of this description of a hard disk drive to check your answers.

Task 4.

Study this diagram. Answer these questions.

1. What sort of things can damage a hard disk?
can damage things a hard disk dust, Fingerprint and smoke particle
2. How big is the gap between the read/write heads and the disk?
The gap between the read/write is can move across the disks and reach all part quickly.
3. How can we protect a disk drive from damage?
Can we protect a disk driver from damage clear the dust and to touch with the hands

Task 5.

Now listen to part 2 of the description to check your answers.
Task 6

Reading: Storage device
There are many different kinds of storage device for computers, and developments are taking place all the time. List the storage device mentioned in this unit so far. List any other.

Usb
Floppy disk
Cd-Rom

Task 7

Work in groups of three. Read two texts each and complete your sections of the table.

Medium	Advantage	Disadvabtages
Floppy disk Fixed hard disk Removable hard disk CD-ROM disk Magneto-optical disk Magnetic tape	They are also very cheap They are fast and can store much data They are almost fast as fixed hard disks They are removable They are removable, have large capacities and last for long time They it store very large amounts of data	They are slow and have a limited capacity They are fixed inside the computer and you cannot use them to transfer data They are relatively expensive They also slow compared to hard disks They are expensive and do not all conform to one standard They are drives are slow

Task 8

Now exchange information with the other students in your group to complete all the sections of the table. Ask questions like these.

What are the advantages of floppy disks?
Advantages of floppy are very cheap, but are very slow.
What are the disadvantages of magnetic tape?
Disadvantages of magnetic tape are drives slow and not allow random access
Do CD-ROM conform to a standard?
Cd-rom disks are very common.

Task 9

Fill in the gaps in this summary of storage devices using the correct word from this list.
but however because so therefore for this reason

Floppies are very cheap, but they are slow and have a limited capacity. Hard disks are fast and can store large amounts of data because they are fixed inside the computer for this reason you cannot use them to transfer data. You can transfer data with removable hard disks but they are expensive. CD-Rom disks can hold quite large

Task 10

Now fill the gaps in this paragraph about computer uses.

Computers are now part of our everyday life. In shops, they calcule bill in factories, they control machine . In hospital , they look after patient records and medicine. When we have a bank account, a computer control our many . In our homes, computers provide entretanment and information.