In a computer, storage is the place where data is held in an
electromagnetic or optical form for access by a computer processor. There are
two general usages.1) Storage is frequently used to mean the devices and data
connected to the computer through input/output operations - that is, hard disk
and tape systems and other forms of storage that don't include computer memory
and other in-computer storage. For the enterprise, the options for this kind of
storage are of much greater variety and expense than that related to memory.
This meaning is probably more common in the IT industry than meaning 2.2)
In a more formal usage, storage has been divided into: (1) primary storage,
which holds data in memory
(sometimes called random access memory or RAM)
and other "built-in" devices such as the processor's L1 cache, and
(2) secondary
storage, which holds data on hard disks,
tapes, and other devices requiring input/output operations.
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