1 / 12

CP1610: Introduction to Computer Components

Archival storage refers to data storage solutions designed for long-term retention and durability. Unlike secondary storage, archival storage is used for permanent data such as backups from hard disks or unchanging files like music and movies. Common media include optical storage (CDs, DVDs), flash memory (USB drives, and digital cameras), and magnetic storage. Each type offers unique advantages and disadvantages, with varying capacities and formats. Understanding these components is essential for efficient data management and preservation.

dwight
Télécharger la présentation

CP1610: Introduction to Computer Components

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CP1610:Introduction to Computer Components Archival Storage Devices

  2. What is Archival Storage? • Similar to secondary storage. • Typically more durable. • Used for long-term or permanent storage: • Data backups from hard disks; • Permanent storage of data that will not be changed (ex: music or movies);

  3. Common Archival Storage Media • Optical Storage • Flash Memory • Magnetic Storage

  4. Optical Storage • Use light (lasers) to read and write data. • Not subject to data loss or corruption. • Compact Discs (CD’s) • Digital Video Disks (DVD’s)

  5. How Optical Storage Works • Light is used to burn a series of ‘pits’ (dark spots) on a disk. • Dark spots and light spots are read as 0’s and 1’s (binary). • Re-writable discs use ‘Phase’ technology: • Special dyes are used that react to the laser; • The ‘Phase’ of the dyes can be changed to change the data.

  6. Data Storage on Optical Media • CD-ROM drives • Use CDFS (Compact Disc File System) or UDF (Universal Disk Format); • Hold about 780 MB of data. • DVD drives • Use only UDF; • Uses the MPEG-2 encoding standard; • Standard hold about 4.5 GB of data. • Dual-layered DVD’s can hold up to 8.5 GB of data.

  7. Optical discs have tracks and sectors, just like magnetic disks. • Tracks and sectors are arranged in a spiral, instead of concentric circles. Floppy Disk

  8. Flash Memory • Also called solid-state storage. • No moving parts (Data on the media is altered using electrical signals). • Relatively high memory capacity. • Commonly used for: • USB drives; • MP3 players; • Digital camera memory; • Mobile phone and PDA memory;

  9. Multimedia Compression Standards • MPEG-1 standard • Image compression for business/home applications • MPEG-2 standard • Video film compression on DVD-ROM • MPEG-3 standard • Audio compression • MPEG-4 standard • Video transmissions over the Internet

  10. Magnetic Storage • Like a cross between a floppy or hard disk, and an audio cassette. • Stores data by aligning magnetic particles on a ‘tape.’ • Magnetic particles are read as 0’s or 1’s (binary).

  11. Advantages of Magnetic Storage • Advantages • Inexpensive and convenient • Large capacity • Several types and formats • Disadvantage • Sequential access

  12. Other Archival Storage Media • ZIP Disks (By Iomega) and SuperDisks (by Imation). • Similar to 3.5 inch floppy disks, but bigger, with more capacity. • Never became popular because of CD’s and DVD’s

More Related