Examine the performance and accessibility of virtual machines to diagnose problems in the vSAN cluster. What to read next Verify Drivers, Firmware, Storage I/O Controllers Against the VMware Compatibility GuideUse the vSAN Health Service to verify whether your hardware components, drivers, and firmware are compatible with vSAN. Examine Health Warning of an Unidentified NVMe DeviceEach PCI-e based storage I/O device in the HCL database has a unique identifier. This unique ID allows the vSAN HCL check to locate an NVMe device in the database. Examining Performance in a vSAN ClusterMonitor the performance of virtual machines, hosts, and the vSAN datastore to identify potential storage problems. Network Misconfiguration Status in a vSAN ClusterAfter you enable vSAN on a cluster, the datastore is not assembled correctly because of a detected network misconfiguration. Virtual Machine Appears as Noncompliant, Inaccessible or Orphaned in vSANThe state of a virtual machine that stores data on a vSAN datastore appears as noncompliant, inaccessible or orphaned because of failures in the vSAN cluster. Attempt to Create a Virtual Machine on vSAN FailsWhen you try to deploy a virtual machine in a vSAN cluster, the operation fails with an error that the virtual machine files cannot be created. Stretched Cluster Configuration Error When Adding a HostBefore adding new hosts to a stretched cluster, all current hosts must be connected. If a current host is disconnected, the configuration of the new host is incomplete. Stretched Cluster Configuration Error When Using RVC to Add a HostIf you use the RVC tool to add a host to a stretched cluster, the configuration of the new host is incomplete. Cannot Add or Remove the Witness Host in a Stretched ClusterBefore adding or removing the witness host in a stretched cluster, all current hosts must be connected. If a current host is disconnected, you cannot add or remove the witness host. Disk Group Becomes LockedIn an encrypted vSAN cluster, when communication between a host and the KMS is lost, the disk group can become locked if the host reboots. Parent topic: Handling Failures in vSAN
