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STORAGE by Mind Map: STORAGE

1. Storage device

1.1. a hardware that records and/or retrieves items to and from storage media.

2. Process

2.1. reading

2.1.1. transferring items from storage medium to memory

2.2. writing

2.2.1. process of transferring item from memory to storage medium

3. Definition

3.1. physical material on which a computer keeps data, information, programs and applications.

4. Cloud storage

4.1. keeps information on servers on the internet, and the actual media on which the files are stored are tranparent to the user

5. Hard drives

5.1. hard disk drives (HDD)

5.1.1. contains one or more inflexible, circular platters that use magnetic particles to store data, instructions and informations.

5.1.2. capacity based on

5.1.2.1. number of platters

5.1.2.2. composition of the magnetic coating on platters

5.1.2.3. density

5.1.3. formatting

5.1.3.1. process of dividing the disk into tracks and sectors

5.1.4. characteristics

5.1.4.1. tracks

5.1.4.2. sectors

5.1.4.3. platters

5.1.4.4. form factor

5.1.4.5. revolutions per min

5.2. SSD

5.2.1. is a flash memory storage device that contain its own processor to manage its storage

5.2.2. advantages compared to HDD

5.2.2.1. faster access times

5.2.2.2. faster transfer rater

5.2.2.3. quieter operation

5.2.2.4. more durable

5.2.2.5. lighter weight

5.3. Redundant array of independent disks (RAID)

5.3.1. group of two or more integrated hard drives

5.4. external hard drives

5.4.1. separate freestanding device that connects with a cable to a USB port or other port

6. Portable flash memory storage

6.1. memory card

6.1.1. memorable flash memory storage devices that you insert and remove from a slot in a computer, mobile devices or a card reader or writer

6.1.2. examples :

6.1.2.1. SDHC

6.1.2.2. SDXC

6.1.2.3. miniSD

6.1.2.4. microSDHC

6.2. USB flash drives

6.2.1. plugs into a USB port on a computer or mobile devices

7. Optical disc

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

7.2. store items in a single track that spirals from center of disc to edge of disc

7.3. divided into every sized section

7.4. examples :

7.4.1. CD-ROM

7.4.1.1. can be read from but not written to

7.4.2. CD-R

7.4.2.1. user can write once but not erase

7.4.3. CD-RW

7.4.3.1. erasable multisession disc

7.4.4. DVD-ROM

8. Enterprise storage

8.1. enterprise hardware

8.1.1. allows large organizations to manage and store data and informations using devices intended for heavy use, maximum efficiency and maximum availability

8.2. Network attached storage (NAS)

8.2.1. server that is placed on network with the sole purpose of providing storage to user computer and devices attached to network

8.3. Storage area network (SAN)

8.3.1. high speed network with sole purpose of providing storage to other attached server

8.4. Tape

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

8.4.2. reads and writes data information on a magnetic tape

9. Other examples :

9.1. magnetic stripe card

9.1.1. has magnetic stripe that contains information

9.1.2. example : at the back of credit card

9.2. smart card

9.2.1. stores data on a integrated circuit embedded in the card

9.3. RFID tag

9.3.1. consist of an antenna and a memory chip that contains the information to be trasmitted via radio waves

9.3.2. RFID reader reads the radio sign and transfer the informations to a computer or computing device

9.4. NFC-enabled device

9.4.1. NFC tag contains a chip and antenna that contains informations to be transmitted

9.4.2. most NFC tags are self adhesive