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Subjecthda lost interupts in 2.3.41
I was having a problem with losing interupts on hda also ,since then I
have not had any problems ,I think what I may have done to correct this
was to in the bios set the drives to lba ,pio4 ,disable ACPI and make sure
you force a update of ecs (i think it's called ecs or ecsv) I could never
get UDMA support in the intel PIIX4 with out forcing a update. In the
kernel I disabled ACPI support ,enabled good-bad firmware kept all the
UDMA settings including tunning of the PIIX4 and that was pretty much it
all works well so far.

debian:~# cat /proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0213-0213 : isapnp read
0220-022f : soundblaster
0278-027a : parport1
02f8-02ff : serial(set)
0376-0376 : ide1
0378-037a : parport0
037b-037f : parport0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(set)
0678-067a : parport1
0a79-0a79 : isapnp write
c000-cfff : PCI Bus #01
c000-c0ff : ATI Technologies Inc 3D Rage Pro AGP 1X/2X
d000-d01f : Intel Corporation 82371AB PIIX4 USB
d400-d407 : Promise Technology, Inc. 20246
d800-d803 : Promise Technology, Inc. 20246
dc00-dc07 : Promise Technology, Inc. 20246
e000-e003 : Promise Technology, Inc. 20246
e400-e41f : Promise Technology, Inc. 20246
e400-e407 : ide2
e408-e40f : ide3
e410-e41f : PDC20246
e800-e8ff : Lite-On Communications Inc LNE100TX
e800-e87f : eth0
f000-f00f : Intel Corporation 82371AB PIIX4 IDE
f000-f007 : ide0
f008-f00f : ide1

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