[Beowulf] Re: Purdue Supercomputer

Geoff Jacobs gdjacobs at gmail.com
Sun May 11 16:47:11 PDT 2008

Karen Shaeffer wrote:
> If the motherboard is powered down, then the IPMI board can
> restart it and can also report failures at the system board level.
> So the system board power distribution must be distinct from the
> IPMI power distribution, even when they connect to a node on the
> system board that has power all the time. Is that reasonable? If
> so, then it appears to me that a full IPMI implementation on the
> system board would need that distinct and independent power
> distribution that used to be on the daughterboard, if that
> capability is to be maintained. That is all I really meant with my
> comment.
You want a persistent, fault tolerant +5V supply. Anyone have any
thoughts about exactly how stable +5V standby off the PCI rails really is?

Geoffrey D. Jacobs

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