IBM HDs vanish on warm-boot?

[Roger Olofsson]

Steve Franks skrev:
> I just had this problem this week - drives are fine until you access
> one and then disappears.
> 
> Checked my bios monitor page and 12V was only 11.8V.  Changing from a
> 300W to a 500W power supply magically fixed the problem...
> 
> I don't claim that this is necessarily your problem, but it caught me
> off-guard and it's worth looking at.
> 
> Steve
> 
> On 7/16/07, Roger Olofsson <raggen at passagen.se> wrote:
>> 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
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> 
> 

Thank you for your answer. I'll check the PSU and if necessary replace it.