Before you upgrade Review the guide and any referenced documents before you begin the upgrade. Follow the practices of your company to perform upgrades. Review the Microsoft Windows administration of the system architecture, VM technology, and data center operations. Be familiar with Converged Systems concepts, terminology, and troubleshooting. Child TopicsUpgrade guidelinesPlan and prepare for the VMware vSphere 7.0 upgrade to ensure minimum impact on production traffic. Support and requirementsSupport and requirements to upgrade to VMware vSphere 7.0 are described. Increase the maximum LUN per targetIncrease the maximum LUN value for FC Adapter policy to 1024. Download VMware vSphere upgrade filesDownload upgrade files for VMware vSphere 7.0. Each item is listed in the VxBlock System Release Certification Matrix (RCM) 7.0. Back up the system and hostsBack up the VxBlock System configuration and hosts. Take a snapshot of all VMware vSphere management VMsTake a snapshot of VMware vSphere management VMs (VMware vCSA and VMware PSC). Upgrade components to the minimum required RCM versionsEnsure the source VMware vCSA and VMware ESXi are in the minimum supported build version to upgrade to VMware vSphere 7.0. Avoid back-in-time upgrade restrictions. Prepare for the VMware vCenter Server upgradeTo prepare for the VMware vCenter Server upgrade, address the configuration requirements. Estimate upgrade timeReview the following considerations to ensure that you provide adequate scheduled maintenance windows to complete the upgrade. Pre-upgrade considerations for Enhanced Link ModeConsider the following before starting the Enhanced Link Mode (ELM) upgrade.