# Post-SPP Firmware Update - Mandatory Cold Power Cycle Procedure

After applying an HPE Service Pack for ProLiant (SPP) on Gen11 and Gen12 servers, a full cold power cycle is required to ensure proper initialization of updated firmware components.

An iLO reset or standard operating system reboot is not sufficient after an SPP update.

Failure to perform a cold power cycle may result in:

- Inconsistent Redfish storage inventory
- Smart Array controller desynchronization
- Missing or stale drive objects
- Management platform initialization failures
- Incomplete firmware activation

Perform the following steps for cold power cycle:

1. **Power OFF the server**:Shut down gracefully through the operating system or iLO interface. Confirm the server is completely powered off.
2. **Disconnect AC Power**: Physically remove all power cables from the server power supplies.
3. **Wait for 60 Seconds**: Allow sufficient time for residual power to drain. This clears controller cache and resets hardware state.
4. **Reconnect Power**: Reattach all power cables securely.
5. **Power ON the Server**: Boot the system normally.

A full AC power removal forces:

- Smart Array controller re-enumeration
- PCI bus reinitialization
- Storage firmware reload
- Redfish object tree regeneration
- Hardware state synchronization

This process resolves the majority of post-SPP Redfish storage inconsistencies observed on Gen11 and Gen12 platforms.

HPE strongly recommends performing a full cold power cycle after major firmware bundle updates to ensure all updated components are fully initialized.
