3 ultra100 controllers

["T. Ryan Halwachs" <halwachs@cats.ucsc.edu>]

sent this to promise:

> -----Original Message-----
> From: T. Ryan Halwachs [mailto:halwachs@cats.ucsc.edu] 
> Sent: Monday, August 26, 2002 4:18 PM
> To: support@promise.com
> Subject: 3 ultra100 controllers
> 
> 
> hi,
>  i am trying to use three Promise technology controllers in one system.
> the promise bios only shows drives attached to the first 2 controllers.
> how can i use the drives attached to the third controller?
> 
> cheers,
> ryan
> 
> 
> 

got this in reply:

> From: support <support@promise.com>
> To: 'T. Ryan Halwachs' <halwachs@cats.ucsc.edu>
> Subject: RE: 3 ultra100 controllers
> Date: 28 Aug 2002 08:23:29 -0700
> 
> Hi Ryan
> 	Sorry you will not be able to used 3 ultra100 in single system.
> 2 is the most.
> 
> It's All About Your Data!
> 
> Kevin Huynh
> Reseller Technical Support.
> Promise Technology, Inc
> 1745 McCandless Dr.
> Milpitas Ca, 95035
> 408-228-6300
> 
> 

from pdc202xx.c in 2.4.19-ac4

/* 
*  linux/drivers/ide/pdc202xx.c	Version 0.35	Mar. 30, 2002 
* 
*  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org> 
* 
*  Promise Ultra33 cards with BIOS v1.20 through 1.28 will need this 
*  compiled into the kernel if you have more than one card installed. 
*  Note that BIOS v1.29 is reported to fix the problem.  Since this is 
*  safe chipset tuning, including this support is harmless 
* 
*  Promise Ultra66 cards with BIOS v1.11 this 
*  compiled into the kernel if you have more than one card installed. 
* 
*  Promise Ultra100 cards. 
* 
*  The latest chipset code will support the following :: 
*  Three Ultra33 controllers and 12 drives. 
*  8 are UDMA supported and 4 are limited to DMA mode 2 multi-word. 
*  The 8/4 ratio is a BIOS code limit by promise. 
* 
*  UNLESS you enable "CONFIG_PDC202XX_BURST" 
* 
*/

is it possible (using Linux) to run 3 (or more) PDC20267 based ultra100 cards in the same machine?

cheers,
ryan