Read–write memory

For read–write file system permissions, see file system permissions.

Read–write memory is a type of computer memory that can be easily written to as well as read from using electrical signalling normally associated with running a software, and without any other physical processes. ^[a][1] The related storage type RAM means something different; it refers to memory that can access any memory ___location in a constant amount of time.^[2]

The term might also refer to memory locations having both read and write permissions. In modern computer systems using memory segmentation, each segment has a length and set of permissions^[b] associated with it.^{[citation needed]}

Types

Read–write memory is composed of either volatile or non-volatile types of storage. Typically read-write speeds are limited to its bandwidth or have mechanical limitations of either rotation speeds and arm movement delays for storage types such as Cloud Storage, Hard Disk Drive or CD-RWs, DVD-RWs, SD cards, Solid State Drive, SRAM, and DRAM, or other integrated circuitry.Cite error: A <ref> tag is missing the closing </ref> (see the help page).

See also

• Read-mostly memory (RMM)
• Random-access memory (RAM)

References

1. "JEDEC: read/write memory". JEDEC. Retrieved 7 March 2017.
2. "JEDEC: random-access memory", JEDEC, retrieved 7 March 2017

Footnotes

1. Unlike ROM or "read-only memory" and distinct from EEPROM.
2. For example, read, write, or execute