IBM HDs vanish on warm-boot?

[Roger Olofsson]

Dear mailing list,

I have 2 IBM HDs and one WD HD (ata) in an old pc and for some reason 
FBSD 6.2 can't find the IBMs on a warm-boot. Cold-boot is fine and, the 
WD is fine.

The motherboard is an old Aopen AX34 and all settings are default except 
for ACPI that's off.

The first thought that came to mind was that one of the IBMs are going 
bad, but, I find it very unlikely that both HDs are doing it. One is a 
120 and one is an 80gigger but both 'vanish' on warm-boot.

Some other setting in bios than ACPI?

Grateful for any answer,

/Roger