[fm-discuss] Proposal: libtopo eumeration of power supplies and fans via IPMI

[Gavin Maltby]

Eric Schrock wrote:
> On Mon, Jan 07, 2008 at 04:17:32PM -0800, Richard Elling wrote:
>> I have some heartburn over this statement.  I think it will be confusing 
>> in thoses
>> cases where a set of domains may share the same physical chassis (eg. blade
>> servers).  Perhaps we need a different name, other than "chassis'?
>>
> 
> Chassis is already an established term in the hc:/ topology, with
> 'systemboard' to differentiate between multiple domains.  I don't see
> any reason to deviate from the established convention, since the FMRIs
> in this case are in fact associated with the chassis, not some other
> construct.

The M9000 system with expansion cabinets and additional power cabinets
is a good test of the intended topology.  The M9000 base chassis
contains some cpu/mem/IO as expected together with 15 PSUs in the
front and 12 fan trays in the back.  You may then connect an
expansion cabinet that again has cpu/mem/IO and the same number
of PSUs and fan trays, and these are cabled together with some
giant cables that allow you to configure domains that span the
two cabinets (as far as I can tell).  Finally, both the base
and expansion cabinet can be partnered by yet another
power cabinet that has another 15 PSUs.  So in total there
are 4 chassis units all side by side, 2 of which are for power
only.  I suspect the M9000 is not a target system for this
stage of the project, but we should plan to accomodate future
extended systems such as this.

Cheers

Gavin
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