Esx.problem.vmfs.heartbeat.timedout - !link!

To understand the error, one must first understand the mechanism of the VMFS "heartbeat." In a VMware environment, ESXi hosts do not continuously poll a datastore to see if it is alive; that would be inefficient. Instead, a host that has mounted a VMFS volume writes a special "heartbeat" file—a periodically updated timestamp and signature—on the datastore. Multiple hosts sharing the same datastore (in a cluster) read this file to confirm that the storage is responsive and that the volume’s metadata is consistent.

: Ensure that the HBA drivers and storage firmware are compatible and up to date according to the VMware Compatibility Guide. esx.problem.vmfs.heartbeat.timedout

: If no heartbeat completes within 16 seconds, the datastore is marked offline , causing virtual machines on that volume to become "Inaccessible". 2. Common Symptoms To understand the error, one must first understand

He closed his laptop. The heartbeat was back, but the system was telling him it was running on borrowed time. He'd deal with it in the morning. : Ensure that the HBA drivers and storage

According to Broadcom (VMware) Knowledge Base articles , these timeouts are typically caused by factors outside the ESXi software itself: