On 10 Oct 99, at 12:26, Mark Rode wrote:
> >Another reason why you would want to do that is the IDE
> >channels only operate as fast as the slowest device on that
> >channel. By having the old slower HD with the fast new HD you
> >limit the speed to the old HD's, and negate any faster speed on the
> >new one.
> >Dale Laluk / [log in to unmask]
>
> This had validity a very long time ago when IDE devices and their
> on board controllers were new technology. However this has not been
> true for many many years. Modern IDE controllers ...since Win95 and
> earlier....have no problem making distinctions between IDE mode
> types. and with a modern controller you can mix any IDE devices on
> a channel without regard for mode type or age of the device.
I believe the elimination of this issue is far more recent --
around the introduction of UDMA. It became less of an issue when
EIDE provided a second channel, and when newer CD-ROM drives started
supporting Mode 3 or 4 even though the fastest CD drives are barely
stretching the limits of Mode 1.
But it was right around the introduction of UDMA that IDE/EIDE/UDMA
channels started being able to have their master and slave devices
using different modes.
David G
PCBUILD maintains hundreds of useful files for download
visit our download web page at:
http://nospin.com/pc/files.html