Atomic Test And Set Of Disk Block Returned False For Equality !!link!! Jun 2026

This change must be applied to all hosts sharing the datastore. Also, do not disable ATS heartbeat on hosts that are part of a vSAN cluster, as it can negatively impact the cluster.

: Used SCSI reservations to lock an entire LUN (Logical Unit Number), preventing other hosts from accessing it entirely during updates. ATS Method This change must be applied to all hosts

: It often occurs in clustered environments where multiple hosts share the same datastore. A "false for equality" result means the host could not acquire a lock on the metadata because another entity had already updated or locked it. ATS Method : It often occurs in clustered

If you work with distributed databases (like Cassandra, ScyllaDB, or FoundationDB), Ceph, or any system that uses complex consensus algorithms (Raft/Paxos), you might eventually stumble upon a terrifying log message: This change must be applied to all hosts