El Mar 20 Nov 2001 20:52, escribi�:
> Using MDK80 kernel 2.4.x
>
> Mainboard with Tyan 2 athlon 1.33 GB
>
> Just for test  I try to move an iso image
>
> from one directory to another  :
>
> 1) on  IDE UDMA 100  first seconds the rate was 8MB  but after  go to 4.5
> 2) on SCSI (160 pin )     nearly the same as IDE
>
> is possible to set something ?
>
> thanks
>
> Pierfrancesco

Try using hdparm as root.
Some interesting settings are:
-c1  <-- Activates the 32 bits I/O support.
-d1  <-- Enables DMA
-u1  <-- Set interrupt-unmask
-X66  <-- Enables UltraDMA mode 2, for UltraDMA 100 I believe is -X69 but I'm 
not sure (read hdparm documentation).
-m16  <--  Sets the sector count for multiple sector I/O to 16. Use the 
command hdparm -i /dev/hda (or hdb,, or ...) to get the maximum setting for 
this number (MaxMultSect).
example (for the hda disk, as root):

hdparm -c1 -d1 -X69 -m16 -u1 /dev/hda

***IMPORTANT***: Use these settings at your own risk (please before doing 
anything type "man hdparm").
Salu2
�scar.

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