On Wed, 12 Jan 2011, John R Pierce wrote:
> To: centos@xxxxxxxxxx
> From: John R Pierce <pierce@xxxxxxxxxxxx>
> Subject: Re: Kernel Errors Present...
>
>
>> In the BIOS I turn DMA off for /dev/hda and /dev/hdc,
>> but they still show up in /proc/ide/.../settings as
>> using_dma 1.
>
>
> say HUH? IDE PIO modes are like 3-7 MBytes/sec and require 100% CPU
> utilization during the transfer phase. why in dogs name would you be
> doing this in 2011 ?
I'm only using 40 wire IDE cables, and from past experience
I don't trust DMA 100%
I'd rather transfer data slower with hopefully more
stability.
I will build a new machine at some time, using SATA and
possibly PCI express.
But this will have to do for now :)
Keith
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