Ubuntu - File Copy Seems Resource Intensive

[Gregory Piñero]

On 7/17/06, Lea Gris <lea.gris at noiraude.net> wrote:
> hdparm -v /dev/hda should show you if DMA and 32bit access is enabled.
> 28MB/s is a poor performance for modern hard drives.
>
> /dev/hda:
>  multcount    = 16 (on)
>  IO_support   =  1 (32-bit)
>  unmaskirq    =  0 (off)
>  using_dma    =  1 (on)
>  keepsettings =  0 (off)
>  readonly     =  0 (off)
>  readahead    = 256 (on)
>  geometry     = 65535/16/63, sectors = 117231408, start = 0
>
> to enable this perform:
>
> hdparm -c1 -m16 -d1 /dev/hda
>
> then test again with hdparm -t /dev/hda

Ok, I tried this but performance doesn't seem much better, or is that
all I should expect?
chiefinnovator at MAIN1:~$ sudo hdparm -c1 -m16 -d1 /dev/hda

/dev/hda:
 setting 32-bit IO_support flag to 1
 setting multcount to 16
 setting using_dma to 1 (on)
 multcount    = 16 (on)
 IO_support   =  1 (32-bit)
 using_dma    =  1 (on)
chiefinnovator at MAIN1:~$ sudo hdparm -tT /dev/hda

/dev/hda:
 Timing cached reads:   308 MB in  2.02 seconds = 152.16 MB/sec
 Timing buffered disk reads:   80 MB in  3.04 seconds =  26.31 MB/sec

-Greg Pinero