I just installed a new dvd burner, a NEC AD-7170A, and for some reason DMA doesn't work. When I check the settings of the drive with "hdparm /dev/hdc" I get the following output
Code:
/dev/hdc:
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
HDIO_GETGEO failed: Inappropriate ioctl for device
I can change the DMA settings with "hdparm -d1 /dev/hdc" and then DMA is turned on. However, when I try to copy something from a dvd, DMA is automatically disabled after a few seconds
The drive is spinning really fast for a few seconds, but then the speed is lowered and the desktop starts to hang
This is the output op dmesg
Code:
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0xd1 { IllegalLengthIndication LastFailedSense=0x0d }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44 { AbortedCommand LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44 { AbortedCommand LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44 { AbortedCommand LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x44 { AbortedCommand LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: DMA disabled
hdc: ide_intr: huh? expected NULL handler on exit
hdc: ATAPI reset complete
VFS: busy inodes on changed media.
Does anybody know what could cause this?
