Re: Increasing IDE Channels
From: Bartlomiej Zolnierkiewicz
Date: Wed Jul 07 2004 - 17:36:46 EST
[ next time please use/cc linux-ide ML ]
On Thursday 08 of July 2004 00:20, John W. Ross wrote:
> Greetings,
Hi,
> Changed ide.h:
>
> IDE_NR_PORTS (10)
> to
> IDE_NR_PORTS (12)
You've changed the wrong define. Bump MAX_HWIFS in <asm/ide.h> instead.
> 1.) Could someone please explain why there is a limit of 10 interfaces (is
> this something that I shouldn't even try)?
- there are no more major numbers assigned for IDE
- for majority people of people it is enough
- IDE driver uses static data structures so higher number of interfaces
means more memory wasted (if you don't use all of them of course)
- nobody cared
> 2.)What did I miss on moving to 12?
It should work with MAX_HWIFS corrected.
> 3.) I could understand a limit of 12, as hda, hdb, hdc... hdw, hdx, would
> only allow a possible 13th interface, but at 14 you would totally exhaust
> the alphabet, but is that still relevant with the newer method of
> enumerating partitions?
What newer method are you talking about?
Regards,
Bartlomiej
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