The Eaton 1550 Evolution BBU (Battery Backup Unit) uses 1 DB9 and 1 RJ50 connector. These connectors are used for communication and management purposes, ensuring that the BBU can interface correctly with other components of the system.

The minimum XtremIO software version required for expanding a Starter X-Brick cluster is 4.0.4. This version includes the necessary features and improvements to support the expansion process, ensuring compatibility and optimal performance.

In preparation for a single-to-dual online cluster expansion, the power cables that are pre-staged by being connected to Power Distribution Unit B (PDU-B) only are for the right-side Power Supply Units (PSUs) of the Storage Controllers (SCs). Specifically, these would be the power cables for X2-SC1-PSU-R and X2-SC2-PSU-R. This configuration ensures that there is a balanced power distribution across the PDUs and that the new cluster components will have power connectivity once they are physically installed1.
The process typically involves:
Identifying the correct power cables for the SCs' PSUs.
Connecting these cables to the designated ports on PDU-B.
Ensuring that the cables are properly managed and labeled for easy identification during the expansion process.
This procedure is part of the standard practices for expanding an XtremIO cluster, as detailed in the Official Dell XtremIO Maintenance Achievement document1.

1 - Verify no host I/O
2 - Verify the cluster PSNT and health
3 - Disable notifications
4 - Stop the cluster service
5 - Power off the hardware

To replace a power supply unit (PSU) in a storage controller of an XtremIO cluster, a specific command needs to be executed.
The correct command to initiate this process is replace-storage-controller-psu sc-psu-id=1 cluster-id="ABC123".
This command specifies the action to replace the PSU (replace-storage-controller-psu), the PSU ID (sc-psu-id=1), and the specific cluster ID (cluster-id="ABC123").
Using this command ensures that the correct PSU in the specified cluster is prepared for replacement.