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    SubjectRe: libata-pata with ICH4, rootfs
    Alistair John Strachan (s0348365@sms.ed.ac.uk) said: 
    > > > Is it possible to use pata_mpiix (or pata_oldpiix) with an ICH4 IDE
    > > > controller and boot off it?
    > >
    > > ata_piix (the SATA/PATA driver) deals with the ICH4. pata_mpiix is
    > > specifically for the Intel MPIIX laptop chipset and pata_oldpiix
    > > explicitly for the original PIIX chipset and none of the later ones.
    >
    > Correct me if I'm wrong, but SATA wasn't available on ICH4. Only 5 and
    > greater. The kernel help text agrees with me.
    >
    > My IDE controller usually works with CONFIG_BLK_DEV_PIIX; I was interested in
    > using your pata_xxx drivers in replacement, assuming there was support.

    pata_xxx is for older PIIX, not ICH4. ICH* is handled by ata_piix, which
    can drive both SATA *and* PATA in the new kernels. In fact:

    [notting@nostromo: ~]$ lspci | grep IDE
    00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev 01)
    [notting@nostromo: ~]$ dmesg | grep ata
    ...
    ata_piix 0000:00:1f.1: version 2.00ac6
    ata1: PATA max UDMA/100 cmd 0x1F0 ctl 0x3F6 bmdma 0x1860 irq 14
    ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x1868 irq 15
    ...
    [notting@nostromo: ~]$ uname -r
    2.6.19-1.2839.fc7

    Bill
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