What are examples of nonvolatile storage?
Examples of non-volatile memory include read-only memory, flash memory, ferroelectric RAM, most types of magnetic computer storage devices (e.g. hard disk drives, solid state 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. 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.
- RAM is called 'volatile' memory by analogy because if the computer loses power, all the data stored in RAM (or other volatile memory) is lost or 'evaporates'. Non-volatile memory is memory that keeps its data while the system isn't running.
- Chemical Bonds contribute to volatility. The major attractive forces between molecules in a liquid are called hydrogen bonds. Less hydrogen bonding is expected between molecules of a volatile liquid compared with other less volatile liquids. Compared to methoxymethane, ethanol is not nearly as volatile.
- It's a liquid with a significant vapor pressure at any temperature. Therefore, yes. It's obviously not as volatile as some other liquids, like gasoline. But it's a lot more volatile than, for example, ionic liquids.
Originally Answered: Why is a ROM called non-volatile memory? That memory was lost. It was volatile. ROM memory is non-volatile because it's still there when the computer is unplugged. Flash memory is considered non-volatile because it also retains data when the power is removed.
- Main memory is where programs and data are kept when the processor is actively using them. When programs and data become active, they are copied from secondary memory into main memory where the processor can interact with them. Main memory is sometimes called RAM. RAM stands for Random Access Memory.
- Once it is erased, it can be reprogrammed. An EEPROM is similar to a PROM, but requires only electricity to be erased. EPROM: Acronym for erasable programmable read-only memory, and pronounced e-prom, EPROM is a special type of memory that retains its contents until it is exposed to ultraviolet light.
- Flash memory is an electronic (solid-state) non-volatile computer storage medium that can be electrically erased and reprogrammed. Toshiba developed flash memory from EEPROM (electrically erasable programmable read-only memory) in the early 1980s and introduced it to the market in 1984.
Types of memory that retain their contents when power is turned off. ROM is nonvolatile, whereas RAM is volatile. This term often refers to the CMOS memory in PCs that holds the BIOS.
- Non-volatile memory is typically used for the task of secondary storage, or long-term persistent storage. 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.
- There is one major difference between a read-only memory (ROM) and a random-access memory (RAM) chip: ROM can hold data without power and RAM cannot. Essentially, ROM is meant for permanent storage, and RAM is for temporary storage.
- Read-only memory, or ROM, is a form of data storage in computers and other electronic devices that can not be easily altered or reprogrammed. RAM is referred to as volatile memory and is lost when the power is turned off whereas ROM in non-volatile and the contents are retained even after the power is switched off.
Updated: 23rd October 2018