[mythtv-users] Re: DMA not enabled

[Steve Adeff]

On Thursday 13 October 2005 12:50, Kirk Bocek wrote:
> Here's the output on my SATA drive:
>
> # hdparm -Tt /dev/sda
>
> /dev/sda:
>   Timing cached reads:   3832 MB in  2.00 seconds = 1915.88 MB/sec
> HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl
> for device Timing buffered disk reads:  184 MB in  3.02 seconds =  60.84
> MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
> ioctl for device
>
> So it fails on some sort of IO command but still runs the benchmark.
>
> Kirk

those IO errors are normal as hdparm is designed for IDE while the SATA 
drivers treat SATA as a SCSI device.  from your numbers though, DMA is 
definitely on.

Steve