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Date: Fri, 23 Mar 2001 10:27:29 +0000
From: quintaq@yahoo.co.uk
To: <linux-kernel@vger.kernel.org>
Subject: Re: UDMA 100 / PIIX4 question
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On Wed, 21 Mar 2001 11:14:53 -0800
Tim Moore <timothymoore@bigfoot.com> wrote:

> Change partition type to 'c' (fat32+LBA); check that BIOS is set for
> (AUTO or USER) and LBA.
> 
Hi Tim,

I am afraid that I do not know how to change my partition type.  I can confirm. however, that the BIOS is set to Auto / LBA and that BIOS confirms UDMA 5 is set (and cannot be set unless the correct cabling is detected).

> 
> Regarding the PIIX4, I reran basic throughput read tests on a more
> recent UDMA5, 5400RPM Maxtor on the PIIX4 and HPT366 (Abit BP6 +
> 2.2.19p17 + ide.2.2.18.1221.patch) chipsets.

<snip>

But is my controller, though detected as a PIIX4 (and described as such in the Asus manual), really a PIIX4?  lspci :

00:00.0 Host bridge: Intel Corporation: Unknown device 1130 (rev 02)
00:01.0 PCI bridge: Intel Corporation: Unknown device 1131 (rev 02)
00:1e.0 PCI bridge: Intel Corporation: Unknown device 244e (rev 01)
00:1f.0 ISA bridge: Intel Corporation: Unknown device 2440 (rev 01)
00:1f.1 IDE interface: Intel Corporation: Unknown device 244b (rev 01)
00:1f.2 USB Controller: Intel Corporation: Unknown device 2442 (rev 01)
00:1f.3 SMBus: Intel Corporation: Unknown device 2443 (rev 01)
00:1f.4 USB Controller: Intel Corporation: Unknown device 2444 (rev 01)
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 04)
02:0a.0 Ethernet controller: Winbond Electronics Corp W89C940
02:0c.0 Multimedia audio controller: Creative Labs SB Live! EMU10000 (rev 04)
02:0c.1 Input device controller: Creative Labs SB Live! (rev 01)
02:0d.0 Multimedia video controller: Brooktree Corporation Bt848 TV with DMA push (rev 12)
02:0e.0 SCSI storage controller: Adaptec AHA-7850 (rev 03)

On the other hand, cat /proc/ide/piix :

                               Intel PIIX4 Ultra 100 Chipset.
--------------- Primary Channel ---------------- Secondary Channel -------------
                 enabled                          enabled
--------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------
DMA enabled:    yes              no              yes               no 
UDMA enabled:   yes              no              yes               no 
UDMA enabled:   5                X               2                 X
UDMA
DMA
PI

Regards,

Geoff

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