Storage Devices

Mutability

Allows information to be overwritten at any time.

Memory Card

An electronic flash memory storage disk commonly used in consumer electronic devices such as digital cameras, MP3 players, mobile phones, and other small portable devices. Memory cards are usually read by connecting the device containing the card to your computer, or by using a USB card reader.

Random Access

Any location in storage can be accessed at any moment in approximately the same amount of time.

Hard Disk

The hard disk drive is the main, and usually largest, data storage device in a computer.

ROM

This memory is used as the computer begins to boot up. Small programs called firmware are often stored in ROM chips on hardware

Tertiary Storage

Typically it involves a robotic mechanism which will mount (insert) and dismount removable mass storage media into a storage device. It is a comprehensive computer storage system that is usually very slow, so it is usually used to archive data that is not accessed frequently. This is primarily useful for extraordinarily large data stores, accessed without human operators.

Non Volatile Storage

Will retain the stored information even if it is not constantly supplied with electric power. Non volatile memory is the device which keeps the data even when the current is off. It is suitable for long-term storage of information.

Cache

a high-speed access area that can be either a reserved section of main memory or a storage device.

USB Drive

a small electronic device containing flash memory that is used for storing data or transferring it to or from a computer, digital camera, etc.

File Addressable

Information is divided into files of variable length, and a particular file is selected with human-readable directory and file names.

RAM

It is called random access memory because any of the data in RAM can be accessed just as fast as any of the other data.

Secondary Storage

It is not directly accessible by the CPU. Computer usually uses its input/output channels to access secondary storage and transfers the desired data using intermediate area in primary storage.

Primary Storage

Main memory is directly or indirectly connected to the central processing unit via a memory bus.

Optical Disk

Optical Disk is any storage media that holds content in digital format and is read using a laser assembly is considered optical media.

Sequential Access

The accessing of pieces of information will be in a serial order, one after the other; therefore the time to access a particular piece of information depends upon which piece of information was last accessed.

Cloud Storage

Cloud storage means "the storage of data online in the cloud," wherein a data is stored in and accessible from multiple distributed and connected resources that comprise a cloud.

Location-Addressable

Each individually accessible unit of information in storage is selected with its numerical memory address.

Content Addressable

Each individually accessible unit of information is selected based on the basis of (part of) the contents stored there. Content-addressable storage can be implemented using software (computer program) or hardware (computer device), with hardware being faster but more expensive option.

Punch card

Early method of data storage used with early computers Punch cards also known as Hollerith cards Containing several punched holes that represents data

RAID

RAID is short for redundant array of independent (or inexpensive) disks. It is a category of disk drives that employ two or more drives in combination for fault tolerance and performance.

Volatile Storage

Requires constant power to maintain the stored information. The fastest memory technologies. All contents are erased when the system's power is turned off or interrupted. It has been more popularly known as temporary memory.