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Thread: Brasero - Speed and Finalisation

  1. #1
    Join Date
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    Question Brasero - Speed and Finalisation

    Hello,

    I used Brasero to burn an iso file to a DVD -R.

    I set the write speed to 4x, and ticked the box so that files could be added after the burn.

    To my surprise, the burn speed was usually well above 4x, and the disk was finalised.

    Can anyone explain these phenomena, and suggest how I can initiate Brasero so that it obeys its instructions?

    Thanks
    Dell Dimension E 520 Viiv
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  2. #2
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    Ubuntu Mate

    Re: Brasero - Speed and Finalisation

    R means that it can only be written to once.

    You need a RW disc.
    Ubuntu Mate 18.04 Bionic
    Mate Desktop

  3. #3
    Join Date
    Feb 2013
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    76

    Re: Brasero - Speed and Finalisation

    Hi,

    the write speed is effecyively chosen by the drive. The burn program can
    only tell what it would like to have.
    One can ask the drive about the supported speeds. E.g. with a "16x" DVD-R
    i get offered by an ASUS BW-16D1HT drive: 8x, 12x, 16x. No 4x.

    The real speed on DVD-R depends on the write position. It increases on
    the way to the rim of the medium. Full nominal speed is often reached
    only at the very end of the burn run.


    The fact that the medium did not stay appendable is surprising.
    Maybe Brasero obeys that check-box only with data compositions but not
    with burning of readily formatted filesystem images.

    The lengthy log of such a Brasero run might give hints what Brasero planned
    to do.


    raleigh3 wrote:
    > R means that it can only be written to once.

    But it is supposed to be writable on its yet unused area after a
    burn program kept it appendable.

    Theoretically a DVD-R can take 99 sessions. In practice this is hardly
    achievable because a dozen unused MB remain between each session.
    But 30 sessions of incremental backups are well realistic.

    Have a nice day

    Thomas

  4. #4
    Join Date
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    Kubuntu 16.04 Xenial Xerus

    Re: Brasero - Speed and Finalisation

    Quote Originally Posted by scdbackup View Post
    Hi,

    the write speed is effecyively chosen by the drive. The burn program can
    only tell what it would like to have.
    One can ask the drive about the supported speeds. E.g. with a "16x" DVD-R
    i get offered by an ASUS BW-16D1HT drive: 8x, 12x, 16x. No 4x.

    The real speed on DVD-R depends on the write position. It increases on
    the way to the rim of the medium. Full nominal speed is often reached
    only at the very end of the burn run.


    The fact that the medium did not stay appendable is surprising.
    Maybe Brasero obeys that check-box only with data compositions but not
    with burning of readily formatted filesystem images.

    The lengthy log of such a Brasero run might give hints what Brasero planned
    to do.


    raleigh3 wrote:
    > R means that it can only be written to once.

    But it is supposed to be writable on its yet unused area after a
    burn program kept it appendable.

    Theoretically a DVD-R can take 99 sessions. In practice this is hardly
    achievable because a dozen unused MB remain between each session.
    But 30 sessions of incremental backups are well realistic.

    Have a nice day

    Thomas
    Thank you
    Dell Dimension E 520 Viiv
    Pentium D 2.8 GHz. Presler Dual Core 2.8GHz, 800MHz FSB 2x2MB cache
    RAM 4 GB. Dual Channel (4x1024GB) 667MHz DDR2
    Browser: Firefox

  5. #5
    Join Date
    Feb 2013
    Beans
    76

    Re: Brasero - Speed and Finalisation

    Hi,

    maybe you worry in vain just because of a misleading message by Brasero.

    I thoroughly blanked a DVD-RW to make it resemble a blank DVD-R.
    (Done by xorriso. There i know what it does.)
    Then i used Brasero 3.11.4 to burn an ISO to it, having checked in sub-menu
    "Properties" the line "Leave this disc open to add other files later".

    The burn progress window indeed reported "Finalizing" when the burn run
    was nearly completed.

    But the resulting medium is not closed:
    Code:
    $ xorriso -outdev /dev/sr4 -toc
    ...
    Media current: DVD-RW sequential recording
    Media product: RITEKW04 , Ritek Corp
    Media status : is written , is appendable
    Media blocks : 145680 readable , 2123520 writable , 2298496 overall
    TOC layout   : Idx ,  sbsector ,       Size , Volume Id
    ISO session  :   1 ,         0 ,    131591s , PBOOT
    Media summary: 1 session, 145680 data blocks,  285m data, 4148m free
    Media nwa    : 174368s
    $
    $
    $ dvd+rw-mediainfo /dev/sr4
    ...
    READ DISC INFORMATION:
     Disc status:           appendable
     Number of Sessions:    2
     State of Last Session: empty
     "Next" Track:          2
     Number of Tracks:      2
    ...
    READ TRACK INFORMATION[#1]:
     Track State:           complete incremental
     Track Start Address:   0*2KB
     Free Blocks:           0*2KB
     Track Size:            145680*2KB
     Last Recorded Address: 145679*2KB
    READ TRACK INFORMATION[#2]:
     Track State:           invisible incremental
     Track Start Address:   174368*2KB
     Next Writable Address: 174368*2KB
     Free Blocks:           2123520*2KB
     Track Size:            2123520*2KB
    ...
    READ CAPACITY:          145680*2048=298352640
    Brasero ejected the drive tray but complained about having failed
    to do so. Then it reported the absent medium as blank DVD with 4.4 GB
    free space ... urgh ...
    ... and i miserably fail to get to see the log which other people post
    when they have problems with Brasero. So i don't even know whether it
    used growisofs or libburn.

    -----

    Use one of the above tools to check your medium state.
    The decisive text line with xorriso is:
    Code:
    Media status : is written , is appendable
    and with dvd+rw-mediainfo:
    Code:
     Disc status:           appendable

    Have a nice day

    Thomas

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