Curious CD-ROM troubles

From: Karl Jones (kjones_at_DBS1.COM)
Date: 10/29/03

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    Date:         Wed, 29 Oct 2003 14:56:50 -0600
To: aix-l@Princeton.EDU

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    On two separate 4.3 systems I am now running into problems mounting CD-ROMs
    locally. Suggestions?

    The Message Reference manual does not list error 0506.

    ======System A
    Regardless of what CD I put in I get the following. I checked the
    modification times on /dev/cd0 and /cdrom and found nothing fishy.

    # mount /cdrom
    mount: 0506-324 Cannot mount /dev/cd0 on /cdrom: Cannot run a file that does
    not have a valid format.
    #

    On snooping about a bit, I noticed ownership and group ownership for /tmp
    were set to '888' and '999' respectively. I checked another system and
    changed these both to 'bin'. On looking at things once more, I found the
    following permissions. I am not sure if the trailing 't' was there
    originally or not. It looks like trouble. Executing 'chmod a+x /tmp' did
    nothing apparently.

    # ls -l
    [snip]
    drwxrwxrwt 15 bin bin 22016 Oct 29 14:31 tmp
    [snip]
    #
    =======System B
    After successfully mounting System B's CD-ROM remotely from System A, I
    unmounted on both systems and tried to locally mount another CD-ROM. Now I
    get the following error, along with a solid amber light on the CD-ROM drive
    despite a reboot. Since I had just been using it successfully, I doubt a
    true hardware problem though diags does give the following message.

    # mount /cdrom
    mount: 0506-324 Cannot mount /dev/cd0 on /cdrom: The device is not ready for
    operation.

    [diag output]
    A PROBLEM WAS DETECTED ON Wed Oct 29 14:46:30 CST 2003
    801014

    The Service Request Number(s)/Probable Cause(s)
    (causes are listed in descending order of probability):

      21F00001: Refer to the Error Code to FRU Index in the system service
                guide.
               Error log information:
                     Sequence number: 983
        FRU: n/a P1-Z1-A3.0

      664-302: Error log analysis indicates hardware failure.
               Error log information:
                     Sequence number: 1002
        cd0 FRU: 97H7610 10-80-00-3,0
                         SCSI Multimedia CD-ROM Drive (650 MB)
        scsi0 FRU: n/a P1-Z1
                         Wide/Fast-20 SCSI I/O Controller

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