On Thu, Mar 24, 2005 at 08:33:13AM +0100, Oliver Korpilla wrote:
> To exclude DMA as possibilty:
> 
> /dev/sda:
>  setting using_dma to 1 (on)
>  HDIO_SET_DMA failed: Inappropriate ioctl for device
> [EMAIL PROTECTED]:~# hdparm -tT /dev/sda
> 
> /dev/sda:
>  Timing cached reads:   2124 MB in  2.00 seconds = 1060.04 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate 
> ioctl for device
>  Timing buffered disk reads:   96 MB in  3.01 seconds =  31.88 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate 
> ioctl for device

When the speed is over 5MB/s you have DMA on in general.  Usually PIO is
2 to 3MB/s.  So DMA is on, the drive just isn't that fast by todays
standards.

Len Sorensen


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