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  • Re: eject: using default device `/dev/sr0'

    From Dan Purgert@21:1/5 to William Torrez Corea on Mon Feb 17 02:20:01 2025
    On Feb 16, 2025, William Torrez Corea wrote:
    *eject: device name is `/dev/sr0'eject: /dev/sr0: not mountedeject:
    /dev/sr0: is whole-disk deviceeject: /dev/sr0: trying to eject using CD-ROM eject commandeject: CD-ROM eject command succeeded*

    I can't eject the optical drive, i try mount the device:

    *sudo mount -t iso9660 /dev/sr0 /mnt/cdrom*

    But i get the following error message:


    *mount: /mnt/cdrom: no medium found on /dev/sr0. dmesg(1) may have
    more information after failed mount system call.*

    Is there a CD/DVD inserted in the drive?

    --
    |_|O|_|
    |_|_|O| Github: https://github.com/dpurgert
    |O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

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    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Us
  • From Thomas Schmitt@21:1/5 to William Torrez Corea on Mon Feb 17 08:40:01 2025
    Hi,

    William Torrez Corea wrote:
    eject: device name is `/dev/sr0'
    ...
    eject: CD-ROM eject command succeeded

    I can't eject the optical drive

    That was with: eject -v /dev/sr0 ?

    What do you get from this program run

    xorriso -outdev /dev/sr0 -eject all


    i try mount the device:
    sudo mount -t iso9660 /dev/sr0 /mnt/cdrom
    But i get the following error message:
    mount: /mnt/cdrom: no medium found on /dev/sr0.
           dmesg(1) may have more information after failed mount system call.

    Was the tray with the medium already loaded and had any blinking
    already stopped ?

    (Linux has an old bug since 2008 which keeps it from waiting for the
    drive to become ready after the tray was pulled in automatically by
    e.g. mount(8) or open(2). Remedy is to insert the tray manually and
    to wait as human supervisor until blinking stops, or to use a burn
    program to load the tray. Only then perform mount.)


    [    2.952866] sr 1:0:0:0: [sr0] scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray

    So the operating system had at least some contact to the drive and was
    able to inquire some of its capabilities.


    We could watch the SCSI command dialog of xorriso with the drive:

    xorriso -scsi_log on -outdev /dev/sr0 \
    -toc -list_profiles all -eject all 2>&1 | \
    tee -i /tmp/xorriso_indev_eject.log

    This will be very verbose. Therefore the pipe to program "tee" which
    puts a copy into file
    /tmp/xorriso_indev_eject.log

    Please send the file to me in private in order not to flood the list.
    I will then inspect it and report if i find something enlightening.


    Have a nice day :)

    Thomas

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From =?UTF-8?Q?J=C3=B6rg-Volker_Peetz?=@21:1/5 to All on Mon Feb 17 12:30:01 2025
    In my experience, `cdrskin -eject` works more reliable than `eject`.

    Regards,
    Jörg.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dan Purgert@21:1/5 to mick.crane on Mon Feb 17 12:20:01 2025
    On Feb 17, 2025, mick.crane wrote:
    On 2025-02-17 01:09, Dan Purgert wrote:
    On Feb 16, 2025, William Torrez Corea wrote:
    *eject: device name is `/dev/sr0'eject: /dev/sr0: not mountedeject: /dev/sr0: is whole-disk deviceeject: /dev/sr0: trying to eject using CD-ROM
    eject commandeject: CD-ROM eject command succeeded*

    I can't eject the optical drive, i try mount the device:

    *sudo mount -t iso9660 /dev/sr0 /mnt/cdrom*

    But i get the following error message:


    *mount: /mnt/cdrom: no medium found on /dev/sr0. dmesg(1) may
    have
    more information after failed mount system call.*

    Is there a CD/DVD inserted in the drive?

    on bookworm without a cd in the tray.
    mick@courgette:~$ eject -v
    eject: using default device `/dev/sr0'
    eject: device name is `/dev/sr0'
    eject: /dev/sr0: not mounted
    eject: /dev/sr0: is whole-disk device
    eject: /dev/sr0: trying to eject using CD-ROM eject command
    eject: CD-ROM eject command succeeded

    mick@courgette:~$ eject
    doesn't report anything just ejects the tray.

    Okay, so you opened the CD Tray. Have you actually put a CD into the
    tray, and closed it?

    You "may" need to wait for the drive to finish reading the disc metadata
    (i.e. drive light stops flashing) before mount(1) will not complain
    about the lack of media. Not 100% sure if it's a generic problem, or
    just my crappy USB CD drive :)

    --
    |_|O|_|
    |_|_|O| Github: https://github.com/dpurgert
    |O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

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    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Us
  • From Thomas Schmitt@21:1/5 to Dan Purgert on Mon Feb 17 13:20:01 2025
    Hi,

    Dan Purgert wrote:
    You "may" need to wait for the drive to finish reading the disc metadata (i.e. drive light stops flashing) before mount(1) will not complain
    about the lack of media. Not 100% sure if it's a generic problem, or
    just my crappy USB CD drive :)

    It's a Linux kernel problem. I have seen it with a dozen different
    drives since Debian 8 of 2015, kernel 3.x.

    The kernel does not wait after emitting a START/STOP UNIT command until
    the drive reports success as answer to TEST UNIT READY commands.
    I diagnosed it in 2020 and submitted a patch.
    https://lore.kernel.org/linux-scsi/20201006094026.1730-1-scdbackup@gmx.net/T/#u
    But my social competence does not suffice for successful kernel work.

    (Also my research of kernel commits does not hold any more.
    2bbea6e11735 from march 2008 cannot be found. A commit from march 2018
    has the same title "cdrom: do not call check_disk_change() inside
    cdrom_open()" but a different commit id. It is too young for causing
    the problem back in Debian 8.)


    Jörg-Volker Peetz wrote:
    In my experience, `cdrskin -eject` works more reliable than `eject`.

    At least it waits for the drive to be ready before it orders it to
    become unready.

    Note that
    cdrskin -eject
    without dev= argument will first grope all optical drives of the
    computer in order to get a list of them and then chose the first one,
    which is most probably /dev/sr0 on a Linux system. This may last some
    time even if there is only one such drive.
    Consider to give the desired drive device file explicitely:

    cdrskin dev=/dev/sr0 -eject


    Have a nice day :)

    Thomas

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dan Purgert@21:1/5 to Thomas Schmitt on Mon Feb 17 13:50:01 2025
    On Feb 17, 2025, Thomas Schmitt wrote:
    Hi,

    Dan Purgert wrote:
    You "may" need to wait for the drive to finish reading the disc metadata (i.e. drive light stops flashing) before mount(1) will not complain
    about the lack of media. Not 100% sure if it's a generic problem, or
    just my crappy USB CD drive :)

    It's a Linux kernel problem. I have seen it with a dozen different
    drives since Debian 8 of 2015, kernel 3.x.

    Ah, I've only had (crappy) USB drives since the 2008-era laptop's
    internal drive went wonky in, um 2010 or '12 or somewhere thereabouts.

    Good to know it's a larger issue, in the event I ever get a tower, or
    otherwise decent CD drive.

    --
    |_|O|_|
    |_|_|O| Github: https://github.com/dpurgert
    |O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

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    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Us