...
Most HPE Cohesity systems are part of clusters with three or more nodes. The Cohesity software maintains data redundancy across the cluster using all of the systems in the cluster. When a system goes down unexpectedly, the Cohesity software compensates by using the built-in redundancy to make the data available. In this way, the Cohesity software closely monitors availability of the systems in the cluster and ensures data coherence in the cluster when a system goes down unexpectedly. The remote office branch office (ROBO) system is a single-node cluster. The processes required to replace the hardware are similar although the concept of redundancy via the multi-node cluster does not apply to a ROBO system.
Any HPE systems running Cohesity software.
Before initiating any hardware replacement, perform the following: Prior to a parts replacement that requires system downtime (i.e., system board, controller, NIC, backplane, etc.) work with Cohesity support to confirm the following: The Cohesity software reports that the cluster is healthy or it is safe to proceed with the part replacement. The software on the node with the suspect hardware is not stuck while booting into the cluster. Confirm that all Cohesity software alerts not related to the hardware to be replaced have been addressed. Work with Cohesity support to stop the Cohesity node software services. It may take a few minutes for the services to stop. Confirm that the node services stop completely before powering the system down. IMPORTANT: Gather the following information before replacing a system board: Note the BIOS settings, in particular, those related to boot order, boot devices, and UEFI vs. legacy boot mode. Know the iLO configuration information. To replace the hardware, perform the following: Note : For non-hot swap parts replaced by HPE field service, the on-site engineer will require system administrator assistance to shut down the system and to confirm system operation after the part replacement. Take necessary ESD precautions. Gracefully shut down the system using one of the following methods: Press and release the Power On/Standby button. Use a virtual power button selection through iLO 5. Replace the suspect part per the standard HPE process. See the maintenance and service guide for the system for details on the part replacement. Important: If the system board is replaced, confirm that the BIOS settings on the replacement system board match those on the replaced system board. Enter the system serial number and product ID in the UEFI System Utilities. Confirm that the networking settings, cabling, and iLO settings are correct. Monitor the boot process to ensure the hardware functions properly. After the hardware replacement, perform the following: After the system boots, confirm the server is added to the Cohesity cluster successfully and the cluster status is healthy. This may require that the Cohesity services are restarted manually. If the system board was replaced, the system may need to be added to the Cohesity cluster. Work with Cohesity support for assistance in resolving any software cluster or node issues. RECEIVE PROACTIVE UPDATES : Receive support alerts (such as Customer Advisories), as well as updates on drivers, software, firmware, and customer replaceable components, proactively in your e-mail through HPE Support Alerts. Sign up for Support Alerts at the following URL: HPE Email Preference Center NAVIGATION TIP: For hints on navigating HPE.com to locate the latest drivers, patches and other support software downloads, refer to the Navigation Tips document. SEARCH TIP: For hints on locating similar documents on HPE.com, refer to the Search Tips document.