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1.3 Storage - Coggle Diagram
1.3 Storage
Solid state storage
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SSDS - solid state drives are storage devices with no moving parts. Most of them use a type of flash memory.
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SSDs have significantly faster read/write times than HDDs. So by using a SDD rather than the traditional HDD can give quicker times for booting up and opening programs and files
Hybrid drives do exist which use solid state storage for the OS and programs, and a hard disk for data
Like HDDs, partable SSDs can be used to backup and transport data
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Magnetic storage
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Magnetic tapes have a much greater storage capacity than HDDs - Hard disk drives- and they also have an extremely low cost per GB.
Magnetic tapes are often used by large Organisations in archive libraries to store huge amoungts of data
It comes in plastic cassettes - containing reels of of tape. Cassetes require a special tape-drive for reading/writing
Tape is read/written sequentially, meaning it is read/written from the beginning to the end, or until it is stopped by the computer. This means tape is very slows when finding specific data stored on it, but has a fast read/write speed once it is in the corect place to begin reading/writing
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Optical storage
Optical storage is data stored using pits and lands. The is stored as microscopic indentations on the shiny surface of the disc. Data is read by shining a laser beam on the surface and detecting changes in the position of the reflected beam
Optical are things like CDs, DVDs and Blu-Ray disks
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But their use is declining, because internet speeds have been increasing, streaming and download services like Netflix and iTunes have removed their need for optical disks. Also, devices like phones and tablets don't have optical drives. DVD-Rs and DVD-RWs used to be popular for backing up data
Optical storage is cheap for smaller amounts of storage but can be very expensive for larger amount compared to the other storage types
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Storage
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Primary Storage
This refers to the memory areas that the CPU can access very quickly, like CPU registers, Cache, ROM and RAM.
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