Topic 1: Storage Flashcards
1
Q
Define storage
A
keep data, information, program and applications
2
Q
Cloud data
A
keep data on server on the Internet
3
Q
differ Reading and Writing
A
reading: from storage to memory
writing: from memory to storage
4
Q
Define capacity
A
number of byte storage can hold
5
Q
First 5 storage terms
A
- Kilo - thousand - 210
- Mega - million - 220
- Giga - billion - 230
- Tera - trillion - 240
- Peta - quadrillion - 250
6
Q
Define access time
A
- time taken to locate an item on the storage medium
- time taken to transfer an item from memory to processor
7
Q
memory vs storage
A
memory is faster but expensive
8
Q
Examples of storage
A
- SSD
- Hard disks
- memory card
- optical dics
9
Q
What is hard disks
A
one or more inflexible, circular platters that use magnetic particles to store instructions, data, and information.
10
Q
what vary the capacity of hard disks
A
- density
- number of platters
- longitudinal or perpendicular recording
- composition of magnetic coating
11
Q
Formatting in hard disks
A
- divide hard disks into tracks and sectors
How: - track form circle on the hard disk
- the track is divided into sectors
- several sectors called cluster
12
Q
characteristics of hard disk
A
- tracks
- sectors
- platters
- read/write head
- revolutions per minumte
13
Q
How hard disk works
A
- circuit board control the small motor
- small motor spin the platter
- head/write head determine current or new location of data
- position the head/write head on correct location to read or write data
14
Q
SSD (solid state disk)
A
flash memory storage device that contain its own processor
15
Q
advantages of SSD
A
- faster access time
- faster transfer rate
- more durable
- less heat generated
- less power consumption
- quieter operations
- lighter weight
