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    SubjectProblem mounting dvd if the drive spin down
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    Hello guys, this is my first post in this list, I'm not a subscriner so
    please CC me for reply and comments. Thank you.


    I've got an Acer Aspire 1601LC laptop and I get strange issue when
    mounting dvd (I cannot say the time 'cause firstly I thought to bad
    dvd).
    If I close the try and then mount the dvd everything is ok, but if the
    drive stops, for example if I insert the dvd and go on with reading my
    mail and try to access again the dvd this hangs up.

    The drive is a Matshita as dmesg say:

    hdc: ATAPI 24X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33)

    Example:
    I put the dvd into the drive, wait some time... the drive spin down
    $ mount /mnt/cdrom

    I got this in /var/log/messages
    Apr 2 18:11:58 maggot kernel: hdc: DMA disabled

    and dmesg:
    hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
    hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
    ide: failed opcode was: unknown

    I'm using 2.6.11 kernel, but 2.6.10 wasn't better.
    I notice that if I run

    $ hdparm -Y /dec/hdc

    output:/dev/hdc:
    issuing sleep command
    HDIO_DRIVE_CMD(sleep) failed: Input/output error

    the drive seems to wake up and I can run mount without problems.

    This is the output from hdparm -i:/dev/hdc:

    Model=UJDA740 DVD/CDRW, FwRev=1.00, SerialNo=
    Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
    RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
    BuffType=unknown, BuffSize=512kB, MaxMultSect=0
    (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
    IORDY=yes, tPIO={min:180,w/IORDY:120}, tDMA={min:120,rec:120}
    PIO modes: pio0 pio1 pio2 pio3 pio4
    DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
    UDMA modes: udma0 udma1 *udma2
    AdvancedPM=no
    Drive conforms to: ATA/ATAPI-5 T13 1321D revision 3:

    * signifies the current active mode


    Is there any solution to this problem?

    Thank in advance, and go on this way.



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