Week 4
Memory unit 2
2.
SECONDARY MEMORY
OR
AUXILIARY STORAGE DEVICES
OR
EXTERNAL STORAGE DEVICES
Secondary Storage is additional memory.
It is used to hold large amounts of information outside the main
memory.
It is separated from the processor and is contained in another box.
The external storage or auxiliary storage devices are used to store,
permanently, excess information that are not of immediate need to the
computer or which could not have been stored in the internal memory due
to its limitations.
They are external memory that is not directly accessible by the
CPU.
, EXAMPLES
OF
EXTERNAL STORAGE DEVICES
(SECONDARY MEMORY)
1. Floppy Disk or Diskette
2. Hard Disk or Local Disk
3. Flash Drive or Pen drive
4. CD-ROM - Compact Disk (CD)
5. DVD-ROM - Digital Video Disk (DVD)
6. Optical Disks: CD-R, CD-RW, DVD-R, DVD-RW
7. Magnetic Disk
8. Memory Card
9. External Hard Disk
10. Blue-ray disc
11. Zip disk
12. Solid State Drive (SSD) etc.
TYPES OF SECONDARY MEMORY
Secondary storage can be of following types:
Memory unit 2
2.
SECONDARY MEMORY
OR
AUXILIARY STORAGE DEVICES
OR
EXTERNAL STORAGE DEVICES
Secondary Storage is additional memory.
It is used to hold large amounts of information outside the main
memory.
It is separated from the processor and is contained in another box.
The external storage or auxiliary storage devices are used to store,
permanently, excess information that are not of immediate need to the
computer or which could not have been stored in the internal memory due
to its limitations.
They are external memory that is not directly accessible by the
CPU.
, EXAMPLES
OF
EXTERNAL STORAGE DEVICES
(SECONDARY MEMORY)
1. Floppy Disk or Diskette
2. Hard Disk or Local Disk
3. Flash Drive or Pen drive
4. CD-ROM - Compact Disk (CD)
5. DVD-ROM - Digital Video Disk (DVD)
6. Optical Disks: CD-R, CD-RW, DVD-R, DVD-RW
7. Magnetic Disk
8. Memory Card
9. External Hard Disk
10. Blue-ray disc
11. Zip disk
12. Solid State Drive (SSD) etc.
TYPES OF SECONDARY MEMORY
Secondary storage can be of following types:
