Re: 2 IDE - 1 CD: which interfaces

[Deryk Barker <dbarker@turing.cs.camosun.bc.ca>]

Thus spake Bill Moseley (moseley@hank.org):

> I can never remember.  With two IDE drives and one IDE CD do you place both hard drives on 
> the same IDE interface as master and slave and the CD on the secondary as master, or do you 
> place the two IDE drives on separate interfaces and make CD slave on one of the interfaces?
> 
> I think I remember that you separate the CD from the hard drives because the CD can slow 
> down the entire interface.  But if that's true does the CD always degraded the interface or 
> only when the CD is being accessed.

I recall reading somewhere that you should not mix CD and HD on one
IDE chain because the CDs were only capable of 16-bit IO so the chain
would have to run at the slower rate whichever device it was
accessing.

I can't speak to the truth or otherwise of this, which I read some
time ago. hdparm tells me that I have both DMA and 32-bit IO enabled
on my DVD-R...maybe things have changed (what? in the computer
business?) 

-- 
|Deryk Barker, Computer Science Dept. | Music does not have to be understood|
|Camosun College, Victoria, BC, Canada| It has to be listened to.           |
|email: dbarker@camosun.bc.ca         |                                     |
|phone: +1 250 370 4452               |         Hermann Scherchen.          |