Atomic Test And Set Of Disk Block Returned False For Equality [work] Jun 2026

This is the most common cause. Check the health, performance metrics (especially latency), and configuration of your storage array. Is it overloaded? Are there any known issues or compatibility matrices between your array's firmware and the version of ESXi you are running? Ensure that the array fully supports the VAAI ATS primitive.

A known architectural race condition occurs when an ESXi host aborts a timed-out heartbeat I/O. In many cases, the "Set" image actually makes it to the physical disk right before the abort command finishes processing. When the ESXi host automatically retries the operation using its original "Test" image, the storage array looks at the disk, detects the already updated block, and correctly flags a mismatch. 3. Fabric and Path Connectivity Dropping This is the most common cause

Understanding this error requires diving into how shared storage manages file locking, the mechanics of atomic operations, and the exact steps needed to resolve the underlying infrastructure instability. 1. The Anatomy of the Error Are there any known issues or compatibility matrices