HDIO_SET_DMA failed: Operation not permitted

[Biswajit Nayak]

Rick, 
 Please find the motherboard and hard disk info that
you have requested. 
ATI RS482 chipset
hda: WDC WD1600BB-22GUC0, ATA DISK drive
micro atx motherboard
http://www.emachines.com/support/product_support.html?cat=Desktops&subcat=T-Series&model=T6414


Please let me know if i can enable dma on this machine

Thanks 
BN


--- Rick Stevens <rstevens at vitalstream.com> wrote:

> On Fri, 2006-01-27 at 17:49 -0800, Biswajit Nayak
> wrote:
> > No I do not think i did with nodma . Here is the
> > output of 
> > 
> > [root at localhost ocsperf]# cat /proc/cmdline
> > ro root=/dev/VolGroup00/LogVol00 rhgb quiet
> 
> Ok, so you didn't disable DMA there.  You are,
> however, using LVM.
> Are you using hardware or software RAID?  If so,
> then you can't just
> turn DMA on on one drive, but on all drives that
> make up the RAID.
> 
> We also need to know a bit more about your hardware.
>  What motherboard
> are you using?  What kind of drives?
> 
> > 2. How to make sure that the controller/drive does
> not
> > permit dma 
> > ?
> 
> Again, it could be an interaction between RAID (if
> used), LVM and your
> controller.
> 
>
----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer    
> rstevens at vitalstream.com -
> - VitalStream, Inc.                      
> http://www.vitalstream.com -
> -                                                   
>                 -
> -        Polygon: A dead parrot (With apologies to
> John Cleese)      -
>
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> 
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