[gentoo-user] Again SATA: hdparm -> dma ???

[gentoo-user] Again SATA: hdparm -> dma ???

[Meino Christian Cramer]

Hi,

 what tool do I need to get/set the complete set of parameters of
 SATA-hds?

 Or in other words: Is SATA under linux scsi or ide ?
 (what a crazy question...)

 With hdparm I only get:
  IO_support   =  0 (default 16-bit)
  readonly     =  0 (off)
  readahead    = 256 (on)
  geometry     = 30401/255/63, sectors = 488392002, start = 63

 Kind regards,
 mcc
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Re: [gentoo-user] Again SATA: hdparm -> dma ???

[Richard Fish]

On 8/4/06, Meino Christian Cramer <Meino.Cramer@gmx.de> wrote:
> Hi,
>
>  what tool do I need to get/set the complete set of parameters of
>  SATA-hds?

You don't.  DMA, NCQ, and the like are enabled automatically if they
are supported by the driver, chipset, and drive.  hdparm -tT can still
be used to test the throughput however.

>  Or in other words: Is SATA under linux scsi or ide ?
>  (what a crazy question...)

The interface is through the SCSI subsystem, but it could also be
called an IDE drive, since the definition of IDE is "Integrated Drive
Electronics", and these drives definitely have most of their smarts
built-in.

-Richard
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