Re: How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)

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To: For users of Fedora <fedora-list@xxxxxxxxxx>
Subject: Re: How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)
From: Alan <alan@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 4 Jan 2007 17:52:14 +0000
Cc:
In-reply-to: <7c1574a90701040926i612fd4e9p38964ad7e0012544@xxxxxxxxxxxxxx>
References: <200701040914.38868.kevin@xxxxxxxxxxxxxxxxxxx> <7c1574a90701040823r5133da89o7fea4e30a1e77968@xxxxxxxxxxxxxx> <200701041009.06736.kevin@xxxxxxxxxxxxxxxxxxx> <1167930985.3745.281.camel@xxxxxxxxxxxxxxxxxxxxxxxx> <7c1574a90701040926i612fd4e9p38964ad7e0012544@xxxxxxxxxxxxxx>
Reply-to: For users of Fedora <fedora-list@xxxxxxxxxx>

> > hdparm -d1 <device>
> 
> I've yet to run across any SATA controllers which allow one to enable
> or disable DMA support via hdparm.

The SATA drivers always enable DMA when possible.  A dmesg is really
needed to see what is going on.

Follow-Ups:
- Re: How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)
  - From: Kevin Kempter

References:
- dd backup unbelievably slow on SATA laptop
  - From: Kevin Kempter
- Re: dd backup unbelievably slow on SATA laptop
  - From: Lonni J Friedman
- How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)
  - From: Kevin Kempter
- Re: How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)
  - From: Matt Davey
- Re: How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)
  - From: Lonni J Friedman

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