Hello!

I bought a new ST3200822A ( Seagate 200 GB Hard Disk Drive ) and 
connected it to my mainboard ( ASUS A7A266 with ALI Magik 1 Chipset).
I use an ATA100 cable ( 80 conductors ).

Operating System : Windows XP professional Service pack 1
Chipset Drivers : Integrated 2.07 ( included MINI IDE driver v1.51 )

My new HDD works properly, but the device manager shows it only runs
in PIO mode, so i have 2,5 MB/s read/write at maximum, although
the BIOS detected the HDD as a UDMA 5 disc. I use the NEWEST BIOS for
the asus a7a266.

Went to a friend and tried the new HDD there WITH MY cable.
After booting, the Windows Device Manager showed UDMA-5 mode.
So the HDD and the Cable are okay.
My friend uses WinXP prof SP1 , so the same as I do.
But he has an Nvidia nForce2 Chipset.

I changed things (on my computer):
I connected the ST3200822A as primary master and a
DVD-device as secondary master.
I created a NTFS partition on the new disc and installed Windows (xp prof sp1).
Directly after this i saw : PIO mode in Windows. THEN i installed
InT 2.07 drivers. ( the first drivers on the FRESH system ).
After reboot still only PIO mode.

Seagate offers a DOS-tool to see and switch UDMA modes of their drives.
I used it and the drive really is set to UDMA 5, but in Windows it runs
in PIO mode. After this i tried using the NEWEST atapi.sys of WinXP SP2 RC1 as driver
for "Primary IDE-channel" but still no change in transfer mode.

So my result is that it has to be a chipset-driver problem. I hope that the drive
and your chipset are not completely incompatible!

Another important fact is that i already have a ST360021A, a bit older HDD.
It runs in UDMA 5 mode properly.
I will attach screenshots and photos in a zip file!


short facts:
A7A266 with M1535D+ southbridge
ST3200822A HDD properly working in UDMA5 on an other computer.
Working ATA100 80-conductor cable

Newest bios
WinXP prof SP1 ( with newest atapi.sys )
newest chipset drivers 

HDD runs in PIO mode in Windows, although BIOS and Seagate-tool are detecting it as UDMA 5 drive.

I hope you can help me, ASUS does not support this "old" board any more.

Greetings
Jan-Philip