HP StorageWorks 500 Modular Smart Array - Manual (Page 67)

Configuration and Utilities
4-4 HP StorageWorks Modular Smart Array 500 System User Guide
Controller Firmware Auto Cloning
In a redundant controller configuration, both controllers must execute the same
version of firmware. During power up (or when a redundant controller is installed as
a hot-plug procedure), the system compares the controller firmware versions. If the
versions differ, the controller displays a user input message seeking to initiate
Controller Firmware Auto Cloning. If 60 seconds elapse with no user input, cloning
begins automatically, and the system overwrites one firmware version with the other
version.
When the cloning is complete, the system resets the modified controller. After the
modified controller powers up, the controllers begin operating in redundant mode.
The system clones firmware based on the following criteria:
• Non-Hot-Plug Cloning—If the system powers up with both controllers installed,
the system clones the most recent firmware version from either controller.
• Hot-Plug Cloning—If the system is operating and an optional redundant
controller is installed, the 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 system
operation.
• Incompatible Version Cloning—If a specific version of firmware is
incompatible with certain hardware revisions of a controller, the 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 system does not reset the
updated controller if the controller is operating and processing I/O. In this case, the system
does not enter redundant mode and provides an informational message on the controller
display. To configure redundancy, cycle the system power. Refer to “System Power
Down” in Chapter 3.