Operation considerations

If an individual LP is affected, the following recovery actions (ranked from least to most disruptive) should be considered when planning recovery procedures.

• If an affected LP continues to operate with a problem, allow it to do so.
• If the operating system in an LP remains active but processing is interrupted, consider the applicability of a restart or IPL.
• Perform a stand-alone dump and IPL the operating system.
• Perform an orderly shutdown of the operating system in an affected LP. If the LP is not critical, allow the other LPs to continue.

If all LPs are affected, or if a critical LP is affected and did not respond to the recovery actions directed only to it, the following recovery actions (also ranked from least to most disruptive) should be considered when planning recovery procedures.

• Perform an orderly shutdown of all the operating systems. Activate the LPs and IPL the operating systems.
• Perform an orderly shutdown of all the operating systems. Perform the most appropriate recovery action (for example, in response to a hardware failure). Perform a power-on reset.
• If a power-on reset fails to initialize the LPs, perform a power-on reset to attempt a recovery. IPL the most critical operating system.