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DVD ROM, Combo Drives and Other Storage Devices

DVD ROM, Combo Drives and Other Storage Devices. Objectives. Explain the data arrangement in a DVD List the types of constructional formats of DVDs List the types of DVDs Explain the working of the DVD drive Explain the parts of the DVD drive Identify the speed listings of DVD drives

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DVD ROM, Combo Drives and Other Storage Devices

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  1. DVD ROM, Combo Drives and Other Storage Devices

  2. Objectives Explain the data arrangement in a DVD List the types of constructional formats of DVDs List the types of DVDs Explain the working of the DVD drive Explain the parts of the DVD drive Identify the speed listings of DVD drives Install the DVD drive Configure the DVD drive Identify combo drives Troubleshoot the DVD drive Explain the other storage devices

  3. Data Arrangement in DVD Data is arranged in a spiral manner Data is recorded outwards from the center Each data track is made of millions of data pits Basic composition of the DVD is made of: Polycarbonate plastic Thin reflective layer Lacquer

  4. Constructional Formats of DVD DVD can hold data on single or both the sides. Single-sided single-layered DVD is also known as DVD-5 and has capacity of 4.7 GB. Single-sided dual-layered DVD is also known as DVD-9 and has capacity of 8.5 GB. Double-sided single-layered DVD is also known as DVD-10 and has capacity of 9.4 GB. Double-sided dual-layered DVD has a capacity of 17 GB.

  5. Types of DVD - I

  6. Types of DVD - II DVD-ROM - Stores films, computer software in capacity ranging from 4.7 GB to 17 GB. DVD-Video - Stores movies and requires DVD drives with MPEG-2 decoder. DVD-Audio - Stores high-quality music and can also store video content and slide shows. DVD-R and DVD+R - Can be written only once.

  7. Types of DVD - III DVD-RW and DVD+RW - Known as phase-change disks. DVD-RAM - Can be accessed in the same manner as a hard drive or floppy disk. DVD-VR and DVD+VR - Used for the creation of movies that can be edited. HD-DVD – Known as Advanced Optical Disc.

  8. Working of the DVD Drive Tracking system of the DVD player consists of tracking motor and spindle motor. DVD drive reads the data from DVDs with the help of a laser assembly. Laser beam reads the data on the DVD. Laser beam focuses on the reflecting layer of the DVD. Laser is reflected off the reflective layer onto a photosensitive receptor. Photosensitive receptor studies the reflected signal for changes in reflection. The data is then sent to the intended device directly or through a DAC.

  9. Difference between DVD and CD In DVD the pit length is 2.25 times smaller. The track pitch is reduced by 2.16 times. DVD has slightly larger data area on the disc. In DVD the error correction code is 1.32 times more efficient compared to CD. In DVD the sector overhead is less by 1.06 times.

  10. DVD drives and specifications DVD drive speed – DVDs rotates counterclockwise and are recorded at a constant data rate called Constant Linear Velocity (CLV). Interface – Physical connection of the drive to the PC’s expansion bus. Loading mechanism – Tray, caddy and slot are three distinctly different mechanisms for loading a disc into a DVD drive.

  11. DVD ROM Drives Read-only drives, cannot write or record information on a DVD. Speed of the DVD ROM drive is indicated by a number followed by an x. DVD-ROM drives can have two to three speeds listed.

  12. Structure of the DVD ROM Drive Front panel of the DVD ROM drive has a tray that accepts the DVD. Back panel of the DVD player has different ports for the connecting the DVD drive to the computer. Back panel also includes jumper settings. Jumper connections configures the DVD drive as either master or slave. Front Panel Back Panel

  13. Combo Drives Combines the functionality of DVD and CD drives. Combo drive is a CD writer drive that can read and write DVDs and CDs. Allows playing DVDs and CDs. Enables writing data on CD-R and CD-RW disks.

  14. Other Storage Devices Tape drive – Reads the data and write it to a tape. Tape drives have large capacity to store data. Pen drive – Called as thumb drives due to their small sizes. Storage size ranges from megabytes to gigabytes. ZIP drive – Proprietary product manufactured by Iomega. Hold 1GB or 2 GB of data and are inexpensive and durable.

  15. Troubleshooting Manage the DVD drive properly in order to avoid problems Troubleshooting the DVD drive is very important, as a faulty drive can damage the DVD Problem that may occur are: DVD is not playing No power in an external DVD drive No power in an internal DVD drive Tray of the internal DVD drive is not opening DVD drive is running slowly

  16. Summary – I Digital Versatile Disk stores data digitally. DVD can store more data than seven CDs. DVD is made up of layers of polycarbonate plastic that are covered by reflective layers of aluminum and gold DVD is about 1.2 millimeters in thickness. Single-sided single-layered, Single-sided double-layered, Double-sided single-layered, and Double-sided double-layered are four construction formats for DVD. DVD-ROM, DVD-Video, DVD-Audio, DVD-R and DVD+R, DVD-RW and DVD+RW, DVD-RAM, DVD-VR and DVD+VR are the types of DVD.

  17. Summary – II Motor, Laser, Lens, And Tracking Mechanism are the different parts of DVD-ROM drive. IDE cable connects the DVD drive to the motherboard of the computer. Tracking system of the DVD player consists of the tracking motor and the spindle motor. There is a photo sensitive receptor in the DVD drive that accepts the reflected laser and studies the changes in reflection patterns to interpret it as data. DVD drives and burners have speed listings that indicate the speed of the drive as compared to the DVD standards Proper installation and configuration of the DVD drive is very important for the proper working of the DVD drive.

  18. Summary – III Combo drive can play DVDs and record on CDs. Tape drives have large capacities to store data. Pen drives are also called as thumb drives due to their small sizes. Zip disks can hold 1GB or 2 GB of data and are relatively inexpensive, durable compared to floppy disc. Troubleshooting the DVD drive can eliminate most of the problems of the DVD drive. DVD drive can experience problems due to power supply failures, computer problems.

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