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CHAPTER 2 (d) COMPUTING COPONENT - Coggle Diagram
CHAPTER 2 (d) COMPUTING COPONENT
STORAGE MEDIUM
Also called secondary storage
The physical material on which a computer keeps data, information, programs, and applications
STORAGE DEVICE
The hardware that records and/or retrieves items to and from storage media
Writing is the process of transferring data, instructions, and information from memory to a storage medium
Reading is the process of transferring these items from a storage medium into memory
STORAGE CAPACITY
Capacity is the number of bytes (characters) a storage medium can hold
Items on a storage medium remain intact even when you turn off a computer or mobile device
A storage medium is nonvolatile
STORAGE ACCESS TIME
Measure the amount of time it takes a storage device to locate an item on a storage medium
Measure the time required to deliver an item from memory to the processor
Access time of storage devices is slow
HARD DRIVE
HARD DISK
A storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information
Platter
made of aluminum, glass, or ceramic
has a thin coating of alloy material
allows items to be recorded magnetically on its surface
Longitudinal recording = horizontally
Perpendicular recording = vertically
Density
the number of bits in an area on a storage medium
Formatting
the process of dividing the disk into tracks and sectors
Read / Write Head
the mechanism that reads items and writes items in the drive as it barely touches the disk’s recording surface
Last approximately three to five years
SOLID STATE DRIVE (SSD)
A flash memory storage device that contains its own processor
to manage its storage
May be in the form of flash memory chips installed directly on a motherboard or an adapter card
Disadvantages
Have lower storage capacities
Data recovery in the event of failure can be more difficult
Their cost is higher per gigabyte
Advantages
Faster access times (can be more than 100 times faster)
Faster transfer rates
Quieter operation
More durable
Lighter weight
Less power consumption (leads to longer battery life)
Less heat generation
Longer life (more than 10 times longer)
Defragmentation is not required
EXTERNAL HARD DRIVE
A separate freestanding storage device that connects with a cable to a USB port or other port on a computer or mobile device
RAID (redundant array of independent disks)
a group of two or more integrated hard drives
PORTABLE FLASH MEMORY STORAGE
MEMORY CARD
A removable flash memory storage device
Card Reader / Writer
a device that reads from and writes on memory cards
Type of Memory Card
SDHC (Secure Digital High Capacity)
SDXC (Secure Digital Expanded Capacity)
MiniSD
MicroSDHC
MicroSDXC
CF (CompactFlash)
xD Picture Card
Memory Stick PRO Duo
M2 (Memory Stick Micro)
USB FLASH DRIVE
A flash memory storage device that plugs in a USB port on a computer or mobile device
Sometimes called a thumb drive
CLOUD STORAGE
An Internet service that provides storage to computer or mobile device users
Advantages
To access files on the Internet from any computer or device that has Internet access
To store off-site backups of data
OPTICAL DISC
A type of storage medium that consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser
Optical discs store items by using microscopic pits (indentations) and lands (flat areas) that are in the middle layer of the disc
CDs
CD-ROM (CD-read-only memory)
a type of optical disc that users can read but not write on (record) or erase
standard CD-ROM is called a single-session disc
CD-R (CD-recordable)
an optical disc on which users can write once, but not erase, their own items, such as text, graphics, and audio
sometimes is called WORM (write once, read many)
CD-RW (CD-rewritable)
an erasable multisession disc users can write on multiple times