Storage Flashcards
(26 cards)
Store data when the computer is off.
Storage Devices
The material storing data.
Media
Manage the media.
Storage devices
Use lasers.
Optical devices
Use a magnet.
Magnetic devices
Have physical switches.
Solid-state devices
The most common form of storage:
Magnetic Storage Devices
Examples: Hard drives, floppy drives, tape.
Magnet writes charges:
Positive charge = 1
Negative charge = 0
Magnet reads charges:
Drive converts charges into binary.
Formatting creates ____________on the disk, which are divided into ___________
tracks
sectors
abbr
FAT
File Allocation Table
Data is organized in
clusters.
Read with a disk drive.
Mylar disk spins at 300 RPM.
Takes 0.2 seconds to find data.
A 3½ drive that holds 1.44 MB.
Diskettes (Floppy Disks)
Primary storage device in a computer.
Composed of 2 or more aluminum platters.
Spin between 5,400 to 15,000 RPM.
Data found in 9.5 ms or less.
Drive capacity greater than 40 GB.
Hard Disks
Combines speed of hard disks with portability of floppy disks.
High capacity floppy disks store up to 750 MB.
Hot swappable hard disks connect via USB.
Removable High Capacity Disks
Best for infrequently accessed data.
Ideal for backup solutions.
Slow sequential access, capacity exceeds 200 GB.
Tape Drives
Optical Storage Devices
CD-ROM
DVD-ROM
Recordable Optical Technologies
Create data or audio CDs, data cannot be changed.
CD Recordable (CD-R):
Create reusable CDs, can be reused about 100 times.
CD Rewritable (CD-RW)
Developed by Kodak for photo storage.
Photo CD
Allows home users to create DVDs, but not standardized.
DVD Recordable:
Allows reusing of DVD media, but not all players can read it.
DVD-RAM
Data is stored physically with no magnets or lasers.
Solid State Drive
Found in cameras and USB drives, combines RAM and ROM.
Flash Memory:
