Intel MPCMM0001 manual Surprise FRU Extraction/IPMI Failure, Forced Power State Changes

Power and Hot Swap Management

7.4Surprise FRU Extraction/IPMI Failure

The CMM detects a surprise FRU extraction or a failure of the IPMI device fronting the FRU if a device previously in one of the M2-7 states reports a transition to the M2 state. If this scenario is detected, the CMM assumes one of three things has happened:

•Surprise extraction and reinsertion of the same (or another) FRU.

•IPMI Device fronting the FRU failed, FRU was extracted, then the same (or another) FRU is reinserted.

•Watchdog Timer (WDT) on the IPMI device restarted the IPMI Device firmware.

Once this occurs, the CMM shall reclaim all the resources allocated to that FRU. The CMM will log a SEL message describing the situation, i.e. IPMI device failure or surprise extraction. From this point the CMM shall follow the sequence of actions described in Section 7.2, “FRU Insertion”.

7.5Forced Power State Changes

An external authorized entity (e.g., a management interface like RMCP) can request FRU power state changes like Power OFF, RESET etc. The CMM is responsible for handling these requests.

7.6Power Management on the Standby CMM

The standby CMM does not participate in any power management activities in the standby mode. The CMM is in a hot standby state on a standby CMM. The standby CMM starts performing power management activities as soon as it becomes the active CMM.

7.7Power Feed Targets

The CLI allows certain get and set actions to be taken on power feeds for a location. They include the following dataitems; maxexternalavailablecurrent, maxinternalcurrent, and minexpectedoperatingvoltage. These dataitems are described in Section 8, “The Command Line Interface (CLI)” on page 71.

To find the number of feed targets, use the command:

cmmget -l cmm -d feedcount

This returns an integer, indicating the number of power feeds.

As an example, the MPCHC0001 chassis with four power feeds coming from the PEMs will return the number 4, meaning there are four feed targets (feed1, feed2, feed3, and feed4). They correlate to the physical feeds on the MPCHC0001as follows:

feed1 = FeedA1 feed2 = FeedB2 feed3 = FeedA2 feed4 = FeedB1

Refer to the chassis documentation for more information on power feeds.

MPCMM0001 Chassis Management Module Software Technical Product Specification 69