Re: UDMA 100 / PIIX4 question

[Tim Moore <timothymoore@bigfoot.com>]

> 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).

[tim@abit tim]# fdisk /dev/hdc

Command (m for help): t
Partition number (1-4): 1
Hex code (type L to list codes): c
Changed system type of partition 1 to c (Win95 FAT32 (LBA))
...

> 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)
> ...
> 
> 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

ICH2 is marked '80821BA' and is rated ATA/100 by intel, PIIX4 is '82371AB'
so you can look on your motherboard.  Andre is the one to say if the driver
is compatible.  I can't find a single reference to the 80821 in
drivers/block/*.c for 2.2.19pre17 + ide.2.2.18.1221.

Here's what a PIIX4 looks like.

[tim@smp ide]# cat /proc/ide/ide0/config
pci bus 00 device 39 vid 8086 did 7111 channel 0
86 80 11 71 05 00 80 02 01 80 01 01 00 20 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01 f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
07 a3 00 80 00 00 00 00 01 00 02 00 00 00 00 00
...
00 00 00 00 00 00 00 00 30 0f 00 00 00 00 00 00

[tim@smp ide]# cat /proc/ide/piix

                                Intel PIIX4 Ultra 33 Chipset.
--------------- Primary Channel ---------------- Secondary Channel
-------------
                 enabled                          enabled
--------------- drive0 --------- drive1 -------- drive0 ---------- drive1
------
DMA enabled:    yes              no              no                no 
UDMA enabled:   yes              no              no                no 
UDMA enabled:   2                X               X                 X
UDMA
DMA
PIO

[tim@smp tim]# lspci | grep IDE
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
[tim@smp tim]# lspci -n | grep 7.1
00:07.1 Class 0101: 8086:7111 (rev 01)

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