megbolondult DVD-ROM

hello
az a probléma, hogy az ubuntu linuxomon (6.06.1) megbolondult a DVD-olvasó
Linux ddt 2.6.15-26-386 #1 PREEMPT Thu Aug 3 02:52:00 UTC 2006 i686 GNU/Linux

vagyis ha berakok egy adat dvd-t és el akarom olvasni akkor az egész rendszer lelassul, akadozik, a program ami használná a dvd-t az összehal és még a kill-re sem lép ki

a rendszernapló ezekkel van tele:

Aug 31 12:10:38 localhost kernel: [17190128.984000] end_request: I/O error, dev
hdb, sector 7511640
Aug 31 12:10:44 localhost kernel: [17190134.872000] hdb: media error (bad sector): status=0x51 { DriveReady SeekComplete Error }
Aug 31 12:10:44 localhost kernel: [17190134.872000] hdb: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
Aug 31 12:10:44 localhost kernel: [17190134.872000] ide: failed opcode was: unknown
Aug 31 12:10:44 localhost kernel: [17190134.872000] end_request: I/O error, dev
hdb, sector 7511644
Aug 31 12:10:50 localhost kernel: [17190141.488000] hdb: media error (bad sector): status=0x51 { DriveReady SeekComplete Error }
Aug 31 12:10:50 localhost kernel: [17190141.488000] hdb: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
Aug 31 12:10:50 localhost kernel: [17190141.488000] ide: failed opcode was: unknown
Aug 31 12:10:50 localhost kernel: [17190141.488000] end_request: I/O error, dev
hdb, sector 7511648

illetve ilyenekkel
Aug 31 12:12:31 localhost kernel: [17190241.904000] ide: failed opcode was: 0xdf
Aug 31 12:12:31 localhost kernel: [17190242.256000] hdb: drive_cmd: status=0x01
{ Error }
Aug 31 12:12:31 localhost kernel: [17190242.256000] hdb: drive_cmd: error=0x04 { AbortedCommand }
Aug 31 12:12:31 localhost kernel: [17190242.256000] ide: failed opcode was: 0xdf
Aug 31 12:12:32 localhost kernel: [17190242.588000] hdb: drive_cmd: status=0x01
{ Error }
Aug 31 12:12:32 localhost kernel: [17190242.588000] hdb: drive_cmd: error=0x04 { AbortedCommand }
Aug 31 12:12:32 localhost kernel: [17190242.588000] ide: failed opcode was: 0xdf
Aug 31 12:12:32 localhost kernel: [17190242.900000] hdb: drive_cmd: status=0x01
{ Error }
Aug 31 12:12:32 localhost kernel: [17190242.900000] hdb: drive_cmd: error=0x04 { AbortedCommand }
Aug 31 12:12:32 localhost kernel: [17190242.900000] ide: failed opcode was: 0xdfAug 31 12:12:32 localhost kernel: [17190243.284000] hdb: drive_cmd: status=0x01
{ Error }
Aug 31 12:12:32 localhost kernel: [17190243.284000] hdb: drive_cmd: error=0x04 { AbortedCommand }
Aug 31 12:12:32 localhost kernel: [17190243.284000] ide: failed opcode was: 0xdf

mi lehet a probléma?
a lemez jó. másik gépben működik.

hdparm-mal sem tudtam semmit csinálni (door lock-ot akartam kikapcsolni hogy kivehessem a lemezt)
/dev/hdb:
setting drive doorlock to 0 (off)
HDIO_DRIVE_CMD(doorlock) failed: Input/output error

Valószínűleg a probléma szoftveres oldalon van, mert a gép másik DVD-olvasója is ugyanígy viselkedik.