Types of Storage
Storage~~
Storage holds data, instructions and information for future use. A storage medium is the physical material on which a computer keeps data, instructions and information.Every computer user must use a storage as it is used to store various information and data. Storage in pc also have limited space and its call capacity. Capacity is the number of bytes a storage medium can hold
A storage device is the computer hardware that records and/or retrieves items to and from storage media.
-Reading is the process of transferring items from a storage medium into memory.
-Writing is the process of transferring items from memory to a storage medium.
Access time measures:
The amount of time it takes a storage device to locate an item on a storage medium
The time required to deliver an item from memory to the processor
Types of storage devices
A hard disk contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information. Hard disks can store data using longitudinal recording or perpendicular recording. 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. Always keep a backup of your hard disk
How disk cache work:
1) A special purpose chip on the hard disk called controller receive request for data from processor.
2) It will checks disk cache for requested item.
3) If the item is not found in disk cache, it will locate the requested item on platters.
4) Lastly, it will transfer the item to processor.
-RAID (redundant array of independent disks) is a group of two or more integrated hard disks
-An external hard disk is a separate free-standing hard disk that connects to your computer with cable or wirelessly.
-A removable hard disk is a hard disk that you insert and remove from a drive.
-A network attached storage (NAS) device is a server connected to a network with the sole purpose of providing storage.
Flash memory storage- a type of solid state media and contain no moving parts.
Solid state drive (SSD) have several advantages over magnetic hard disk such as faster access time, faster transfer rates, generate less heat and consume less power and last longer.
Most of the gaming laptop got SSD
-A memory card is a removable flash memory device that you insert and remove from aa slot in a computer.
-USB flash drives plug into a USB port on a computer or mobile device.
-Cloud storage is an internet service that provides storage to computer users.
-An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser.
-Tape is a magnetically coated ribbon of plastic capable of storing large amounts of data and information where it read and writes data and information on a tape.
-A magnetic stripe card contains a magnetic stripe that stores information.
-A smart card stores data on a thin microprocessor embedded in the card.
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