03 - Chapter 3 (Storage) PDF
03 - Chapter 3 (Storage) PDF
03 - Chapter 3 (Storage) PDF
Chapter 3
101 CSC- 3
Chapter 3 2
Storage System Characteristics
• Can be internal, external, or remote
• Are nonvolatile
Chapter 3 3
Storage System Characteristics
– File: something stored on a storage medium, such as a
program, document, or image
• Storage technologies:
– Magnetic (conventional hard drives)
– Optical (optical discs)
– Electrons (flash memory media)
4
Hard Disk Drives (HDDs)
• Hard drive: Used to store most programs and data
– Can be internal and external
Chapter 3 5
Magnetic Hard Drives
6
Internal, External, and
Portable Hard Drive Systems
Chapter 3 7
Partitioning
Partitioning:
8
Optical Discs
• Optical discs: store data optically (using laser beams).
• Can be:
– Read-only,
– Recordable or
– Rewritable
9
Optical Drives
• Optical drives: Designed for type of disc: CD, DVD, or
Blu-Ray Disc (BD)
10
Read-Only Discs
11
Recordable Discs
12
Rewritable Discs
– CD-RW
– DVD-RW
– BD-RE; can be dual layer
13
Flash Memory Systems
• Chip-based storage medium
– No moving parts so more resistant to shock and
vibration, require less power, makes no sound
Chapter 3 14
Flash Memory Systems
Chapter 3 15
Flash Memory Cards
• Flash memory card:
A small card containing flash memory chips and metal
contacts.
Chapter 3 16
USB Flash Drives
• Flash memory drives: Consist of flash memory media
and a reader in a single self-contained unit
Chapter 3 17