Computer Storage Devices

Topics: USB flash drive, Computer data storage, Computer memory Pages: 3 (490 words) Published: July 25, 2012
Computer Storage Devices
Computer Architecture: Group 2

Types of Computer Storage
* Primary Computer Storage
* Refers to the storage devices that are actually part of the computer's memory. * can be volatile or non volatile
* Secondary Computer Storage
* Refers to the computer's secondary storage of data. * Has only one example ; the Hard Disk
* Tertiary Computer Storage

Examples of Primary Computer Storage:
* RAM (Random Access Memory)
* RAM is used for storing information temporarily. When a computer gets switched off, the information RAM holds will be deleted. Examples of RAM:
* DRAM (Dynamic RAM)
* Slower than SRAM
* Less expensive
* Has to be refreshed after each read operation
* Utilizes more power
* SRAM (Static RAM)
* Faster than DRAM
* More expensive
* Does not need to be power refreshed
* Utilizes less power

* ROM (Read Only Memory)
* ROM is used to permanently store data. The only disadvantage when using ROM is that the data saved on it cannot be changed / altered. Types of ROM
* PROM (Programmable ROM)
* EPROM (Erasable PROM)
* EEPROM (Electrically EPROM)

Hard Disk (Hard Drive)
* Is a device for storing and retrieving computer data (specifically the PC's OS). * Hard Disks are classified as a non volatile storage of data Types of Hard Disk:
* SATA (Serial Advanced Technology Attachment) uses round serial cable as a data cable and flat SATA specific power connector. * PATA (Parallel ATA) use a flat gray cable for connectivity to the motherboard and Molex power connectors. Example of Tertiary Computer Storage

Floppy Disks
* a disk storage medium composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic carrier lined with fabric that removes dust particles. * They are read and written by a floppy disk drive (FDD) Compact...
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