ata_piix: port disabled. ignoring.

From: Geert Uytterhoeven
Date: Fri May 14 2004 - 08:14:52 EST

Hi Jeff,

I'm trying to install Linux on a SATA disk in a Dell PowerEdge 750, which has
an Intel 82875P chipset with an Intel 6300ESB SATA Storage Controller.

I managed to do the actual installation by booting from a Knoppix 3.4 CD (using
kernel 2.4.26 or 2.6.5 (apparently SATA drivers were not included), doesn't
matter much) in an external USB CD-ROM driver, and installing Debian testing
using FAI (Fully Automatic Installation). It took a while because the SATA
drive was used in backwards compatiblity mode without DMA, but it succeeded.

The kernel I installed was kernel-image-2.6.5-1-686-smp from Debian, which has
SATA support included. But when I want to boot it, I get (manual copy):

| ata1: PATA max UDMA/33 cmd 0x1F0 ctl 0x3F6 bmdma 0xFEA0 irq 14
| ata1: port disabled. ignoring.

I don't care, no PATA devices attached.

| ata2: SATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xFEA8 irq 15
| ata2: port disabled. ignoring.

Bad, the Maxtor 6Y080M0 I want to boot from is there :-(

And after that it tries the normal IDE driver, which of course fails with:

| ide0: I/O resource 0x1F0-0x1F7 not free

I looked at ata_piix.c, and apparently the driver decides whether a port is
disabled by checking a bit in PCI config space, so this looks like a BIOS setup
problem to me. But the BIOS has the first SATA port enabled (`AUTO', and it
does see a 80 GB disk there), while the PATA and second SATA ports are marked

Just to be sure, I also tried acpi=off and pci=noacpi, but no avail.

Do you have a clue? Would it help to try 2.6.6?

Thanks for all suggestions!



Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
Geert.Uytterhoeven@xxxxxxxxxxx ------- The Corporate Village, Da Vincilaan 7-D1
Voice +32-2-7008453 Fax +32-2-7008622 ---------------- B-1935 Zaventem, Belgium
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