Non-Volatile Computer Data Storage System
A Non-Volatile Computer Data Storage System is a computer data storage system that persists a power outage.
- AKA: Non-Volatile Memory, NVM.
- Example(s):
- Counter-Example(s):
- See: Secondary Storage, Holographic Memory, Computer Memory, Power Cycling, Read-Only Memory, Flash Memory, Ferroelectric RAM, Computer Data Storage, Hard Disk Drive, Floppy Disk, Magnetic Tape, Optical Disc.
References
2016
- (Wikipedia, 2016) ⇒ https://en.wikipedia.org/wiki/Non-volatile_memory Retrieved:2016-9-22.
- Non-volatile memory, nonvolatile memory, NVM or non-volatile storage is a type of computer memory that can retrieve stored information even after having been power cycled (turned off and back on). Examples of non-volatile memory include read-only memory, flash memory, ferroelectric RAM (F-RAM), most types of magnetic computer storage devices (e.g. hard disk drives, floppy disks, and magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards.
Non-volatile memory is typically used for the task of secondary storage, or long-term persistent storage. [1] The most widely used form of primary storage today is a volatile form of random access memory (RAM), meaning that when the computer is shut down, anything contained in RAM is lost. However, most forms of non-volatile memory have limitations that make them unsuitable for use as primary storage. Typically, non-volatile memory costs more, provides lower performance, or has worse write endurance than volatile random access memory.
Non-volatile data storage can be categorized in electrically addressed systems (read-only memory) and mechanically addressed systems (hard disks, optical disc, magnetic tape, holographic memory, and such). Electrically addressed systems are expensive, but fast, whereas mechanically addressed systems have a low price per bit, but are slow. Non-volatile memory may one day eliminate the need for comparatively slow forms of secondary storage systems, which include hard disks.
Several companies are working on developing non-volatile memory systems comparable in speed and capacity to volatile RAM.
- Non-volatile memory, nonvolatile memory, NVM or non-volatile storage is a type of computer memory that can retrieve stored information even after having been power cycled (turned off and back on). Examples of non-volatile memory include read-only memory, flash memory, ferroelectric RAM (F-RAM), most types of magnetic computer storage devices (e.g. hard disk drives, floppy disks, and magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards.
- ↑ "A Survey of Software Techniques for Using Non-Volatile Memories for Storage and Main Memory Systems", IEEE Transactions on Parallel and Distributed Systems, 2015.