[ltp] T43: No DMA for /dev/hdc (Ultrabay Slim HDD)

[amateur]

On Fri, Dec 08, 2006 at 09:35:11AM +0100, Felix E. Klee wrote:
 
>   ~# hdparm -d /dev/hdc
> 
>   /dev/hdc:
>    using_dma    =  0 (off)
>   ~# hdparm -d1 /dev/hdc
> 
>   /dev/hdc:
>    setting using_dma to 1 (on)
>    HDIO_SET_DMA failed: Operation not permitted
>    using_dma    =  0 (off)
> 

I didn't use the dvd driver for a long time, but I remember that the
UltraSlim Slot is a connected to the system with ATAPI interface while 
the internal hard disk is connected with a SATA interface. It seems
like that your ATAPI driver(ide-generic) grab the UltraSlim hard
drive, which doesn't support DMA operation for the UltraSlim drive.
You can find the detail explanation and resolutions here:
	http://www.thinkwiki.org/wiki/Problems_with_SATA_and_Linux#DVD_drive_not_recognized

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