Part II - Pre-upgrade tasks Child TopicsIncrease the maximum LUN per targetIncrease the maximum LUN value for FC Adapter policy to 1024. Download VMware vSphere upgrade filesDownload the files needed to upgrade to VMware vSphere 7.0. Each item is listed in the VxBlock System 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 ESXi are in the minimum supported build version to upgrade to VMware vSphere 7.0 and 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.