我的光驱用不了,原因如下,救命阿!!

yaohanping

ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:pio, hdbMA
hdb: ATAPI COMBO 48X24X16X, ATAPI CD/DVD-ROM drive
hdb: ATAPI 48X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33)
hdb: DMA timeout retry
hdb: timeout waiting for DMA
hdb: status timeout: status=0xd0 { Busy }
hdb: drive not ready for command
hdb: ATAPI reset complete

linux显示的光驱名称与它的在电脑中的硬件接口是相符合的,但我用fdisk -l 根本就找不到hdb,也就是光驱了.插入光盘过一会就死了.从去年装上之后就一直没能用上光驱很郁闷

yaohanping

hdb: DMA timeout retry
hdb: timeout waiting for DMA
hdb: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdb: drive not ready for command
hdb: ATAPI reset complete

这是什么意思,希望高人解答

北南南北

http://www.linuxsir.cn/bbs/showthread.php?t=123035

设置一下光驱的DMA

yaohanping

南北大哥,按照你的方法,我执行了下面的命令(我的光驱是combo的)

[root@tsg ~]# /sbin/hdparm -d1 -X66 -c3 /dev/hdb

/dev/hdb:
setting 32-bit IO_support flag to 3
setting using_dma to 1 (on)
setting xfermode to 66 (UltraDMA mode2)
IO_support   =  3 (32-bit w/sync)
using_dma    =  1 (on)
[root@tsg ~]# /sbin/hdparm /dev/hdb

/dev/hdb:
HDIO_GET_MULTCOUNT failed: Invalid argument
IO_support   =  3 (32-bit w/sync)
unmaskirq    =  0 (off)
using_dma    =  1 (on)
keepsettings =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
HDIO_GETGEO failed: Invalid argument
不过最后一句话是什么意思.盘可以读了,非常感谢!!!