Enabling DMA

Dotan Cohen dotancohen at gmail.com
Sun Apr 27 22:02:21 UTC 2008


I cannot enable DMA on my Dell Inspiron laptop with Ubuntu 8.04. See here:

hardy at hardy-laptop:~$ sudo hdparm /dev/sda
[sudo] password for hardy:

/dev/sda:
 IO_support    =  0 (default)
16-bit)
 HDIO_GET_UNMASKINTR failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_KEEPSETTINGS failed: Inappropriate ioctl for device
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 9729/255/63, sectors = 156301488, start = 0
hardy at hardy-laptop:~$ sudo hdparm -d1 /dev/sda

/dev/sda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
hardy at hardy-laptop:~$ sudo hdparm /dev/sda

/dev/sda:
 IO_support    =  0 (default)
16-bit)
 HDIO_GET_UNMASKINTR failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_KEEPSETTINGS failed: Inappropriate ioctl for device
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 9729/255/63, sectors = 156301488, start = 0
hardy at hardy-laptop:~$



How can I fix that? Thanks in advance.

Dotan Cohen

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