Storage
by Pathtaraporn Sangjam
1. Flash Memory Storage
1.1. Flash memory chips are a type of solid state media and contain no moving parts
1.2. Solid state drives (SSDs) have several advantages over magnetic hard disks :
1.2.1. Faster access time
1.2.2. Faster transfer rates
1.2.3. Generate less heat and consume less power
1.2.4. Last longer
1.3. USB flash drives plug into a USB port on a computer or mobile device
1.4. • An ExpressCard module is a removable device that fits in an ExpressCard slot • Developed by the PCMCIA • Commonly used in notebook computers
1.5. USB flash drives plug into a USB port on a computer or mobile device
2. Optical Discs
2.1. An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser
2.2. Typically store software, data, digital photos, movies, and music
2.3. Optical discs commonly store items in a single track that spirals from the center of the disc to the edge
2.4. Track is divided into evenly sized sectors
3. Other Types of Storage
3.1. Tape is a magnetically coated ribbon of plastic capable of storing large amounts of data and information
3.2. A magnetic stripe card contains a magnetic stripe that stores information
3.3. A smart card stores data on a thin microprocessor embedded in the card
3.4. Microfilm and microfiche store microscopic images of documents on a roll or sheet flim
3.5. Enterprise storage stores huge volumes of data and information for large businesses
3.5.1. Uses special hardware for heavy use, maximum availability, and maximum efficiency
4. Hard Disks
4.1. A hard disk contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information
4.2. Hard disks can store data using longitudinal recording or perpendicular recording
4.3. Formatting is the process of dividing the disk into tracks and sectors so that the operating system can store and locate data and information on the disk
4.4. A disk controller consists of a special-purpose chip and electronic circuits that control the transfer of data, instructions, and information from a disk to and from the system bus and other components of the computer
4.5. Characteristics of a hard disk include
4.5.1. Capacity
4.5.2. Platters
4.5.3. Read/Write Heads
4.5.4. Cylinders
4.5.5. Sectors and Tracks
4.5.6. Revolutions per Minute
4.5.7. Transfer Rate
4.5.8. Access Time
5. Cloud Storage
5.1. Users subscribe to cloud storage for a variety of reasons
5.1.1. Store large files instantaneously
5.1.2. Access files from any computer
5.1.3. Allow others to access their files
5.1.4. View time-critical data and images immediately
5.1.5. Store offsite backups
5.1.6. Provide data center functions