WIMS> DMTF DSP1027-2008 - CIM Power State Mgmt Profile

WIMS> DMTF DSP1027-2008 - CIM Power State Mgmt Profile

WIMS> DMTF DSP1027-2008 - CIM Power State Mgmt Profile

Ira McDonald blueroofmusic at gmail.com
Mon Jan 19 15:55:04 EST 2009


Hi folks,

*Before* attempting to read the particular CIM classes and properties
for power state, changing power state (including at a given time), etc.,
read DMTF DSP1027:

  http://www.dmtf.org/standards/published_documents/DSP1027_1.0.1.pdf

Short, excellent document approved in September 2008.

NOTE:  IEEE 1621:2004 specifically *prohibits* exposing to users any other
power states than 'on', 'sleep', and 'off' (with optional qualifiers for soft
or hard in operations - but NOT new primary power states).

Unfortunately, due to legacy from Storage, IETF Host MIB, ACPI, etc.,
DMTF CIM defines MANY power states and does NOT disambiguate
the many apparent synonyms, e.g., "Hibernate (Off - Soft)" versus
simply "Off - Soft".  So the CIM Xxx.PowerStateXxx properties are sort
of deceptive in their IEEE 1621 MappingStrings.

On a better note, DSP1027 Table 3 on page 12 maps DMTF power
states to ACPI power states - useful for PWG power state mappings.

Cheers,
- Ira

Ira McDonald (Musician / Software Architect)
Chair - Linux Foundation Open Printing WG
Blue Roof Music/High North Inc
email: blueroofmusic at gmail.com
winter:
  579 Park Place  Saline, MI  48176
  734-944-0094
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  PO Box 221  Grand Marais, MI 49839
  906-494-2434



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