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storage by Mind Map: storage

1. A storage medium is the physical material on which a computer keeps data, information, programs, and applications

2. Cloud storage keeps information on servers on the Internet, and the actual media on which the files are stored are transparent to the user

3. A storage device is the hardware that records and/or retrieves items to and from storage media

3.1. Reading

3.1.1. A process of transferring item from a storage medium into memory

3.2. Writing

3.2.1. A process of transferring item from a memory into a storage medium

4. An illustration of volatility

4.1. Its contents are erased when power is removed from a computer or mobile device.

5. Screen display volatile

6. Contents of most RAM volatile

7. Contents of storage nonvolatile

8. Access time measures

8.1. The amount of time it takes a storage device to locate an item on a storage medium

8.2. The time required to deliver an item from memory to the processor

9. Hard Drives

9.1. A hard disk, also called a hard disk drive (HDD) contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information

9.2. The storage capacity of hard disks varies and is determined by: -The number of platters the hard disk contains -The composition of the magnetic coating -on the platters -Whether the disk uses longitudinal or perpendicular recording Density.

9.3. Characteristics of a hard disk include: Tracks Sectors Platters Form factor Read/write head Revolutions per minute

9.4. SSD (solid state drive)

9.4.1. flash memory storage device that contains its own processor to manage its storage

9.4.2. advantages over traditional (magnetic) hard disks: -Faster access times -Faster transfer rates -Quieter operation -More durable -Lighter weight

9.5. external hard drive

9.5.1. separate freestanding storage device that connects with a cable to a USB port or other port on a computer or mobile device

9.6. RAID

9.6.1. a group of two or more integrated hard drives

10. memory

10.1. a removable flash memory storage device that you insert and remove from a slot in a computer, mobile device, or card reader/writer

10.2. Portable Flash Memory Storage

10.2.1. -microSDXC -CF -xD Picture Card -Memory Stick PRO Duo -M2

11. Cloud Storage

11.1. an Internet service that provides storage to computer or mobile device users

12. Optical Discs

12.1. consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser

12.2. -Optical discs commonly store items in a single track that spirals from the center of the disc to the edge of the disc -Track is divided into evenly sized sectors

12.3. A CD-RO -can be read from but not written to Single-session disc A CD-R -an optical disc on which users can write once, but not erase A CD-RW -an erasable multi session disc

13. Enterprise Storage

13.1. Enterprise hardware allows large organizations to manage and store data and information using devices intended for heavy use, maximum efficiency, and maximum availability

13.2. Network attached storage (NAS)

13.2.1. a server that is placed on a network with the sole purpose of providing storage to users, computers, and devices attached to the network

13.3. storage area network (SAN)

13.3.1. a high-speed network with the sole purpose of providing storage to other attached servers

13.4. Tape

13.4.1. a magnetically coated ribbon of plastic capable of storing large amounts of data and information

14. Other Types of Storage

14.1. A magnetic stripe card has a magnetic stripe that contains information A smart card stores data on an integrated circuit embedded in the card

14.2. The RFID tag consists of an antenna and a memory chip that contains the information to be transmitted via radio waves

14.3. An NFC-enabled device contains an NFC chip An NFC tag contains a chip and an antenna that contains information to be transmitted Most NFC tags are self-adhesive