Hi,

I have an alphastation 500, with an IDE card and one IDE disk.
This is what they look like under 3.99.3:

cmdide0 at pci0 dev 11 function 0
cmdide0: Silicon Image 0680 (rev. 0x02)
cmdide0: bus-master DMA support present
cmdide0: primary channel configured to native-PCI mode
cmdide0: using kn20aa irq 0 for native-PCI interrupt
atabus0 at cmdide0 channel 0
cmdide0: secondary channel configured to native-PCI mode
atabus1 at cmdide0 channel 1

wd0 at atabus0 drive 1: <ST3160021A>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 149 GB, 310101 cyl, 16 head, 63 sec, 512 bytes/sect x 312581808 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd0(cmdide0:0:1): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA)

I tried to upgrade to 3.99.15 (sources updated about Jan 20), but
neither my custom kernel nor GENERIC find the IDE disk anymore.
The cmdide is still there:

cmdide0 at pci0 dev 11 function 0
cmdide0: Silicon Image 0680 (rev. 0x02)
cmdide0: bus-master DMA support present
cmdide0: primary channel configured to native-PCI mode
cmdide0: using kn20aa irq 0 for native-PCI interrupt
atabus0 at cmdide0 channel 0
cmdide0: secondary channel configured to native-PCI mode
atabus1 at cmdide0 channel 1

No error messages appear on the console. The disk is just simply not
found. When booting 3.99.3, wd0 is probed right after sd0. When
booting 3.99.15 there is a delay of a few seconds after sd0 is
probed, so I'm assuming it is still trying to find the disk, but
fails for some reason.