This document summarizes the main components of computer storage. It describes storage devices as hardware that records and retrieves items from storage media by reading items into memory from storage or writing items from memory to storage. Specific storage devices discussed include hard disks, which use magnetic particles to permanently store data on circular platters; optical discs like CDs, DVDs, and Blu-ray discs that use lasers to read from and sometimes write to discs; removable media like floppy disks, zip disks, and USB flash drives; and cloud storage, which provides online storage over the internet.
This document summarizes the main components of computer storage. It describes storage devices as hardware that records and retrieves items from storage media by reading items into memory from storage or writing items from memory to storage. Specific storage devices discussed include hard disks, which use magnetic particles to permanently store data on circular platters; optical discs like CDs, DVDs, and Blu-ray discs that use lasers to read from and sometimes write to discs; removable media like floppy disks, zip disks, and USB flash drives; and cloud storage, which provides online storage over the internet.
This document summarizes the main components of computer storage. It describes storage devices as hardware that records and retrieves items from storage media by reading items into memory from storage or writing items from memory to storage. Specific storage devices discussed include hard disks, which use magnetic particles to permanently store data on circular platters; optical discs like CDs, DVDs, and Blu-ray discs that use lasers to read from and sometimes write to discs; removable media like floppy disks, zip disks, and USB flash drives; and cloud storage, which provides online storage over the internet.
This document summarizes the main components of computer storage. It describes storage devices as hardware that records and retrieves items from storage media by reading items into memory from storage or writing items from memory to storage. Specific storage devices discussed include hard disks, which use magnetic particles to permanently store data on circular platters; optical discs like CDs, DVDs, and Blu-ray discs that use lasers to read from and sometimes write to discs; removable media like floppy disks, zip disks, and USB flash drives; and cloud storage, which provides online storage over the internet.
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Components of a Computer
STORAGE DEVICE
Prepared by: Dennis S.
Chua CHS NCII-Instructor/Assessor CSS NCII-Instructor Storage What is storage? Holds data, instructions, and information for future use Storage A storage device is the computer hardware that records and/or retrieves items to and from storage media
Reading is the process of
transferring items from a storage medium into memory
Writing is the process of
transferring items from memory to a storage medium Hard Disks • is the computer's permanent storage capacity.
contains one or more
inflexible, circular platters that use magnetic particles to store data, instructions, and information. Types of Hard Disks An external hard disk is a separate free-standing hard disk that connects to your computer with a cable or wirelessly
A removable hard disk is a hard disk
that you insert and remove from a drive
Internal and external hard disks are
available in miniature sizes (miniature hard disks) Optical Discs An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser Typically store software, data, digital photos, movies, and music Read only vs. rewritable Optical Discs A CD-ROM can be read from but not written to •Read from a CD-ROM drive or CD-ROM player
A CD-R is a multisession optical disc on
which users can write, but not erase
A CD-RW is an erasable multisession disc
•Must have a CD-RW drive Optical Discs A DVD-ROM is a high-capacity optical disc on which users can read but not write or erase •Requires a DVD-ROM drive
A Blu-ray Disc-ROM (BD-ROM) has a
storage capacity of 100 GB
DVD-RW, DVD+RW, and DVD+RAM are
high-capacity rewritable DVD formats What is a floppy disk? Thin, circular, flexible disk enclosed in rigid plastic shell
A Zip® disk looks
similar but has much greater storage capability (=170 floppy disk)
Fundamentals of Computers - Lecture 1 9
USB flash drive Is a data storage device that includes flash memory with an integrated Universal Serial Bus (USB) interface.
Fundamentals of Computers - Lecture 1 10
Flash Memory Storage USB flash drives plug into a USB port on a computer or mobile device Cloud Storage Cloud storage is an Internet service that provides storage to computer users. Cloud Storage Cloud Storage Users subscribe to cloud storage for a variety of reasons: