problemas para setar dma em cd e dvd

["Ronaldo Reis Jr." <chrysopa@insecta.ufv.br>]

Pessoal,

Eu notei que as dma destas IDE não estavam ativas.

Vejam

cdrw:

[root@Termix root]# hdparm /dev/cdroms/cdrom0

/dev/cdroms/cdrom0:
 HDIO_GET_MULTCOUNT failed: Invalid argument
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  1 (on)
 using_dma    =  0 (off)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument

DVDRW:

[root@Termix root]# hdparm /dev/cdroms/cdrom1

/dev/cdroms/cdrom1:
 HDIO_GET_MULTCOUNT failed: Invalid argument
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  1 (on)
 using_dma    =  0 (off)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument

Quando tento ativar suporte a DMA da erro:

[root@Termix root]# hdparm -d1 /dev/cdroms/cdrom1

/dev/cdroms/cdrom1:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

Estou usando kernel-image-2.6.7-1-686

Alguem tem alguma ideia?

Valeu
Ronaldo

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