1 / 11

CD and DVD Media

CD and DVD Media. Optical Drives. Definitions. CD-ROM – Compact Disk, Read Only Media/Memory DVD – Digital Versatile/Video Disk. How it lays out. This time the data is INSIDE the disk:. Label, or not. 1. 0. Data Location. Laser. ISO 9660.

amina
Download Presentation

CD and DVD Media

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. CD and DVD Media Optical Drives

  2. Definitions • CD-ROM – Compact Disk, Read Only Media/Memory • DVD – Digital Versatile/Video Disk

  3. How it lays out • This time the data is INSIDE the disk: Label, or not 1 0 Data Location Laser

  4. ISO 9660 • Also called: High Sierra for the hotel in Colorado where standard got developed • Joliet – Microsoft’s extension(s); Mac and Linux support these also. • Rock Ridge – UNIX file system support • El Torito – Bootable CD media • Apple Extensions – Apple’s HFS file system

  5. CD Speed • 1x : Original (and still) audio standard: 150,000Bps or 150KBps • 4x : 600KBps • 24x : The “magic line” • Below this drives and connections were proprietary – and often to sound card • These drives were single speed – always on • At and above 24x • Variable speed – spin up, read, spin down • Uniform connection method (ATAPI-6)

  6. To Burn a CD • Second, more powerful laser (10x read) • Two CD-R formats: 72-minute (650 MB) and 80-minute (700 MB) • Burns organic dye to create pits (0’s) • Need burning software below XP • CD-R is write once, read many • CD-RW is write often, read often (can be erased) • Speeds are <write><re-write><read>; 16x10x40x for mine

  7. UDF • Universal Data Format, replacement for 9660 • Vista supports this but not XP • Supports packet writing • Roxio’s DirectCD and Nero’s InCD allow disk to feel like a hard/floppy disk

  8. DVD • Big step up in capacity: 4.37 GB • Smaller pits, more dense than CD • Single-sided or double-sided • Single layer or double layer • You need decoder (MPEG-2) to watch movies on your PC – most DVD drives ship with them • DVD+R, -R, +RW and –RW

  9. Installation • Master or Slave • Ribbon (data) cable • Sound cable (optional) • Power • You can still find SCSI drives and we are likely to see SATA versions

  10. Buffer Underrun • Fortunately, it is a thing of the past (16x burn rate and slower drives) • No, you don’t see a spec on the buffer size on the drive’s box • BURN-Proof seems to be the maiden name for underrun protection

  11. Troubleshooting • I have had zero luck with trying to clean an optical drive to get it functioning again • Sometimes it’s a compatibility issue… but rare today • Replace the drive

More Related