26 HP MSA 500 G2 Storage System Maintenance and Service Guide
If 60 seconds elapse with no user input, one of the following actions occurs:
•In a non-hot-plug environment, the controller with the most recent firmware disables the controller with the older firmware and continues the power-up sequence. This method prevents automatic loss of a previous version of firmware.
•In a hot-plug environment, cloning begins automatically, and the storage system overwrites one firmware version with the other version.
When the cloning is complete, the storage system resets the modified controller. After the modified controller powers up, the controllers begin operating in redundant mode.
The storage system clones firmware based on the following criteria:
•Non-Hot-PlugCloning—If the storage system powers up with both controllers installed, the storage system clones the most recent firmware version from either controller.
•Hot-PlugCloning—If the storage system is operating and an optional redundant controller is installed, the storage system clones the firmware version from the primary controller, regardless of which firmware version is more recent. This cloning method ensures that all host-initiated I/O remains uninterrupted during storage system operation.
•Incompatible Version Cloning—If a specific version of firmware is incompatible with certain hardware revisions of a controller, the storage system displays the user input message seeking to initiate Controller Firmware Auto Cloning and clones the most recent firmware version that is compatible with both controllers.
IMPORTANT: During incompatible version cloning, the storage system does not reset the updated controller if the controller is operating and processing I/O. In this case, the storage system does not enter redundant mode and provides an informational message on the controller display. To configure redundancy, cycle the storage system power.
Array Configuration Utility
ACU is a browser-based utility with the following features:
