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kann cdrom nicht öffnen

Ich habe seit kurzem ein Problem mit dem DVD Laufwerk. Nach dem Umount kann 
ich das Laufwerk nicht mehr öffnen. Die einzigen Möglichkeiten scheinen ein 
eject als root, oder ein cdrecord -eject zu sein. Das ist extrem nervig. Ich 
benutze Testing. Ausser einem Update habe ich udftools installiert und mit 
cryptsetup herumgespielt. Ich weiss leider nicht ganz genau was ich geändert 
habe. Kann mir vielleicht jemand sagen, wie ich herausfinde, woran das liegt? 
Google hat mich bisher nicht viel weiter gebracht. 
Besten Dank,

oliver


oliver@DARKSTAR:~$ mount /dev/cdrom
mount: block device /dev/hdc is write-protected, mounting read-only
oliver@DARKSTAR:~$ umount /dev/cdrom
oliver@DARKSTAR:~$ lsof /dev/cdrom
lsof: WARNING: can't stat() xfs file system /dev/.static/dev
      Output information may be incomplete.
oliver@DARKSTAR:~$ lsof /dev/hdc
lsof: WARNING: can't stat() xfs file system /dev/.static/dev
      Output information may be incomplete.
oliver@DARKSTAR:~$ eject
eject: Kann nicht auswerfen! Letzter Fehler: Das Argument ist ungültig
oliver@DARKSTAR:~$ eject -r
eject: Kann nicht auswerfen! Letzter Fehler: Eingabe-/Ausgabefehler
oliver@DARKSTAR:~$ su -
Password:
DARKSTAR:~# eject
DARKSTAR:~#    

(Das eject als root war erfolgreich)

aus der fstab:

/dev/hdc        /media/cdrom0   auto    user,noauto     0       0

Auszug aus /var/log/messages:

Jun 16 23:34:59 DARKSTAR kernel: UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting 
volume 'CIVILIZATION4', timestamp 2005/10/19 00:03 (1078)
Jun 16 23:35:57 DARKSTAR kernel: hdc: irq timeout: status=0xd0 { Busy }
Jun 16 23:35:57 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:35:57 DARKSTAR kernel: hdc: DMA disabled
Jun 16 23:35:57 DARKSTAR kernel: hdc: ATAPI reset complete
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:36:17 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:36:17 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388352
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:36:17 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:36:17 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388356
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:36:17 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:36:17 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388352
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:36:17 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:36:17 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:36:17 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388356
Jun 16 23:36:18 DARKSTAR kernel: UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting 
volume 'CIVILIZATION4', timestamp 2005/10/19 00:03 (1078)
Jun 16 23:36:51 DARKSTAR kernel: hdc: irq timeout: status=0xd0 { Busy }
Jun 16 23:36:51 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:36:51 DARKSTAR kernel: hdc: ATAPI reset complete
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:37:12 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:37:12 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388352
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:37:12 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:37:12 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388356
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:37:12 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:37:12 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388352
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: status=0x51 { DriveReady 
SeekComplete Error }
Jun 16 23:37:12 DARKSTAR kernel: hdc: command error: error=0x54 { 
AbortedCommand LastFailedSense=0x05 }
Jun 16 23:37:12 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:37:12 DARKSTAR kernel: end_request: I/O error, dev hdc, sector 
8388356
Jun 16 23:37:12 DARKSTAR kernel: UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting 
volume 'CIVILIZATION4', timestamp 2005/10/19 00:03 (1078)
Jun 16 23:38:34 DARKSTAR kernel: hdc: irq timeout: status=0xd0 { Busy }
Jun 16 23:38:34 DARKSTAR kernel: ide: failed opcode was: unknown
Jun 16 23:38:34 DARKSTAR kernel: hdc: ATAPI reset complete
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