computer systems and hardware

computer systems and hardware

1. peripherals

   • Peripherals are devices that are not the computer's core architecture
     • A peripheral device is generally defined as any auxiliary device such as a computer mouse
     • the have interfaces that allow them to be used as a peripheral by desktop computers, although they are not host-dependent in the same way as other peripheral devices.

2. magnetic

   • The distinction is less technical and more a matter of preference. Other examples of magnetic storage media include floppy disks, magnetic recording tape, and magnetic stripes on credit cards.
     • , magnetic storage media, primarily hard disks, are widely used to store computer data as well as audio and video signals. In the field of computing, the term magnetic storage is preferred and in the field of audio and video production, the term magnetic recording is more commonly used.
   • gnetic storage uses different patterns of magnetisation in a magnetisable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads. As of 2,017

3. solid state storage

   • Solid-state storage devices typically store data using electrically-programmable non-volatile flash memory, although some devices use battery-backed volatile random-access memory (RAM)
     • Over time, the performance gap between the central processing units (CPUs) and electromechanical storage (hard disk drives and their RAID setups) widened, requiring advancements in the secondary storage technology.[9] A solution was found in flash memory, which is an electronic non-volatile computer storage media that can be electrically erased and reprogrammed. Solid-state storage typically uses the NAND type of flash memory, which may be written and read in chunks much smaller than the entire size of the storage device. The size of a minimal chunk (page) for read operations is much smaller
     • Historically, secondary storage in computer systems has been implemented primarily by using magnetic properties of the surface coatings applied to rotating platters

4. secondary storage

   • Secondary storage is storage for noncritical data that does not need to be frequently accessed. It trades high performance for economical long-term archiving. Data that is accessed less frequently can be migrated to secondary storage devices to free up space and improve performance on primary storage devices and lower overall storage costs. Types of secondary storage include devices for backup and archiving. Secondary storage is synonymous with the terms secondary memory, auxiliary storage and external storage.