[mythtv-users] IDE and IDE

ryan patterson ryan.goat at gmail.com
Thu Jan 25 14:48:46 UTC 2007

Both devices can still operate at their fastest speed while connected to the
same ATA channel.  But only one device can use the channel at a time.
Because of limitations in the ATA design, this means that it is very
inefficient to access two different speed devices on the same channel.  This
means burning a CD/DVD (read from the HDD and write to the DVD drive) or
ripping a CD/DVD (read from DVD drive write to the HDD) will bring the
performance to a grinding halt.  The problem is not the devices transferring
data at slow speed.  The problem is the massive over head negotiating
between the two devices.  This limitation of ATA could have been overcome
with the inclusion of queuing of accesses in the design.  But alas it is too

On 1/25/07, Bart Coninckx <bart.coninckx at telenet.be> wrote:
> Hi all,
> my hardware supplier gave me by mistake an IDE harddrive instead of SATA.
> The
> result is that it will be an the same bus as the DVD-recorder (it's a ASUS
> Pundit with only one IDE bus).
> Will this be a big problem in using MythTV as far as performance is
> concerned?
> It's my understanding that two IDE devices on the same bus can slow down
> things, since the slowest device determines the busspeed.
> Thank you!
> Bart
> _______________________________________________
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Ryan Patterson
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