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    SubjectDisk change messages
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    Date
    Hi,

    I've been trying to use vold to automount CDs. The daemon tries to open
    /dev/cdrom and if it succeeds it examines the media and mounts it under
    /cdrom/volume_name.

    The problem is that when there is no disk in the drive the following
    message:
    VFS: Disk change detected on device ide1(22,0)
    is written to system log during each open call. Vold calls open every 5
    seconds, so it's 17280 lines in log/day. I have been able to avoid these
    messages by commenting out a line in drivers/ide/ide-cd.c (patch
    included) and have not seen any problems yet.

    I guess I have three questions:
    1. can this patch break things ? I suppose it could happen only
    if cdrom_saw_media_change was not called when the CD is changed.
    2. is it possible to avoid the message by modifying vold ? E.g. finding
    out that there is no media in the drive without calling open.
    3. is there a clean way to avoid these repeated messages ?

    Thanks, Petr

    --- ide-cd.c 2001/02/22 22:30:02 1.1.1.11
    +++ ide-cd.c 2001/02/27 19:51:58
    @@ -601,7 +601,7 @@

    /* Check for tray open. */
    if (sense_key == NOT_READY) {
    - cdrom_saw_media_change (drive);
    +/* cdrom_saw_media_change (drive); */
    } else if (sense_key == UNIT_ATTENTION) {
    /* Check for media change. */
    cdrom_saw_media_change (drive);
    -
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