RE: Error mounting root fs on 72:01 using Promise FastTrak TX2000 (PDC20271)

["Nicklas Bondesson" <nikomail@hotmail.com>]

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I just realised that I need to have the kernel patched with Walt's pdcraid
patch in order to get it to work. Conclusion: disable all Power Management
options and patch the kernel with Walt's pdcraid patch (attached). That will
do it. I think that Walt's patch should be included in the official kernel.

/Nicke 

-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Walt H
Sent: den 23 december 2003 04:47
To: Nicklas Bondesson
Cc: linux-kernel@vger.kernel.org
Subject: Re: Error mounting root fs on 72:01 using Promise FastTrak TX2000
(PDC20271)

Nicklas Bondesson wrote:
> The patch did not work for me, in fact there was no change at all 
> (anything affected to me). The Promise ataraid driver never gets loaded.
> 
> /Nicke

Not sure what else to try. I see that you've already posted to the ata-raid
list, so I'd hope that somebody else would reply from there. The pdcraid
driver has not received much attention lately, so it may very well be broken
for your configuration. Promise has released a binary/source combo driver
similar to Nvidia's that will still work in 2.4 - you might give that a try.
I have a
PDC20276 based onboard raid setup, however, I use 2.6 with device mapper to
use it. It's a bit of a pain to setup ATM - especially if you want to boot
from it, but it can be done. Good luck,

-Walt


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[-- Attachment #2: pdcraid.patch --]
[-- Type: application/octet-stream, Size: 628 bytes --]

--- /usr/src/temp/linux-2.4.21-xfs/linux/drivers/ide/raid/pdcraid.c	2003-12-22 17:59:09.653139067 -0800
+++ linux/drivers/ide/raid/pdcraid.c	2003-07-21 20:47:14.000000000 -0700
@@ -361,7 +361,11 @@
 	if (ideinfo->sect==0)
 		return 0;
-	lba = (ideinfo->capacity / (ideinfo->head*ideinfo->sect));
-	lba = lba * (ideinfo->head*ideinfo->sect);
-	lba = lba - ideinfo->sect;
+	if (ideinfo->head!=255) {
+		lba = (ideinfo->capacity / (ideinfo->head*ideinfo->sect));
+		lba = lba * (ideinfo->head*ideinfo->sect);
+		lba = lba - ideinfo->sect; }
+	else {
+		lba = ideinfo->capacity - ideinfo->sect;
+	}
 
 	return lba;