Question about RW

Discussion in 'Blu-ray & DVD Players & Recorders' started by Hazzie, Dec 2, 2004.

  1. Hazzie

    Hazzie
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    Hi,

    Can someone explain the DVD RW to me please. I was under the impression that

    DVD R was write once
    If you rceorded a 30 min program then thats the disc finished with

    DVD RW was re-writeable
    If you recorded a 30 min program then you could come back at a later date and record again up till the disc's storage limit and then its finished with.

    However, i was told by a shop assistant, that didnt look confident in what they were saying, that you could write over a whole disc time and time again, very much like a VCR Tape.

    Is that true, and if so is it any special format or just a plain dvd recordable machine?

    Thanks,
    Hazzie.
     
  2. johnjackthom

    johnjackthom
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    Hi Hazzie,

    With DVD-R you can record your 30 min programme and providing you don't finalise the disc, more can be added later until it is full.
    Unfortunately your DVD-R wont play on a standard DVD player until it has been finalised.

    DVD-RW can be used in a similar way to video tapes. You can erase and re-use them a limited number of times. Probably something less than the 100 times I've seen quoted.

    Some recorders support DVD-RAM which operates rather like DVD-RW but can be re-used many more times.
     
  3. Hazzie

    Hazzie
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    Thanks for the information. :thumbsup:
     
  4. liteswap

    liteswap
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    Note that with a non-finalised DVD-R, you can erase stuff which makes it look as if it's disappeared but you never get the space back, as the medium itself is write-once only. All erasing does is wipe out the entry in the disc's index that points to the recording.
     
  5. OT31

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    Does this mean you can cut adverts out of a DVD-R (if you have the right recorder)? I didn't think you could.
     
  6. eddyad

    eddyad
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    I don't think you can do A-B 'erasing' on a DVD - only a complete item. As the medium is not re-writable, I assume that complete new index data is written after each change, and the latest version used when the disk is played. After finalisation the medium becomes portable.
     
  7. liteswap

    liteswap
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    Correct, as I understand it.
     

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