Floppy disks, tapes, zip disks, and hard disks are examples of different storage media that vary in size, storage capacity, accessibility, and portability. Floppy disks have low storage capacity and portability while hard disks have high storage capacity but low portability. Storage media can be optical like CDs, DVDs, or magnetic like floppy disks, hard drives, zip disks, and tapes. Magnetic media uses magnetism to store data and can be accessed directly or sequentially, while optical media uses lasers to read binary data encoded as pits on the storage surface. Flash memory is a type of solid-state circuit media that can be electrically erased and rewritten in blocks.

2. Storage Media Size Storage Capacity Accesstype
Portability
Floppy disk 31/2" 1.44 Mb Direct High
Tapes/Cassettes
vary vary/ 8 Mb Sequential Medium
Zip disk
31/2" 750 Mb Direct low
Hard disk 3.5” up to 500TB Direct N0

3. Use Light to read or write
data
Use a mechanical moving
arm to Read or write data
Electrically reads or
write data

4.  Storage is either:
Optical – media
 e.g. CD-ROM, DVD, CD-R, CD-RW, Blu-ray
 Magnetic – media
e.g. floppy disk, hard drive, zip disk, tape
 Circuit Chips - (removable media)
e.g. flash drive/jump drive/memory
sticks/memory cards

5.  Magnetic
 This is a magnetically coated strip of plastic on
which data can be encoded.
 Tapes are sequential access media,
▪ tape
 Disk are Direct access storage media
▪ . CD-ROM, DVD, CD-R, CD-RW, Blu-ray
▪ floppy disk, hard drive, zip disk

6. The groove on a vinyl record is analog;
a series of detailed bumps wherein the
larger the bump the louder the noise.
On a CD, the digital data is recorded in
a binary form, meaning a series of zeros
and ones, either off or on.A laser beam
is focused onto the track, which reflects
back from the shiny aluminum surface
of the disc. Reflecting back is a one…
“on”.To record data, a stronger laser
has burned a little pit onto the shiny
surface.When the reading laser passes
that pit, it does not reflect back,
indicating a zero or “off”.
Optical media

7. Magnetic media

8.  A)Track, B) Sector track, C) Sector, D) Cluster
Magnetic media

9.  . Hard disk Controller - is the software
interface that enables the computer to read
from and write information to the hard disk
drive.
Magnetic media

10.  The HDC is specifically referred to by the type
of technology used such as
 IDE - Integrated Drive Electronics
 SATA - Serial AdvancedTechnology Attachment
 SCSI – Small Computer Standard interface
 USB -
IDE Cable
SATA Cable
SCSI Cable
Magnetic media

11. Micro Fiche
Micro FilmMagnetic media

12.  Flash memory is a non-volatile
computer storage chip that can be
electrically erased and
reprogrammed. It was developed
from EEPROM (electrically
erasable programmable read-only
memory) and must be erased in
fairly large blocks before these
can be rewritten with new data.
The high density NAND type must
also be programmed and read in
(smaller) blocks, or pages, while
the NOR type allows a single
machine word (byte) to be written
and/or read independently.
Circuit media