Recently I had a customer who migrated their VMware infrastructure from vSphere 7.0 to VMware Cloud Foundation 9.0. After the migration, they wanted to update their vSAN storage policies to take advantage of the new vSAN ESA (Express Storage Architecture) features. However, when they tried to change the storage policy for their production VMs, the operation kept failing with a cryptic error message. The error they were getting was: "Cannot complete operation due to insufficient resources to satisfy current storage policy." This was strange because they had plenty of disk space available. The vSAN cluster was only at 45% capacity, and all the hosts were healthy. Let me walk through how we troubleshooted and fixed this issue. Understanding the Problem First, let's understand what was happening in their environment: They had a 6-node vSAN cluster running VCF 9.0 vSAN was configured with the new ESA architecture They were trying to migrate VMs fro...
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