Atomic Test And Set Of Disk Block Returned False For Equality ((exclusive))

: The disk is not a trustworthy machine. Build your database as if every block write could fail the equality test. Because, eventually, it will.

: Incompatibility between the ESXi HBA drivers and the storage array's firmware can cause ATS primitives to behave unpredictably. Broadcom support portal Impact and Symptoms Datastore Loss : The disk is not a trustworthy machine

High I/O latency can cause the heartbeat update to time out or arrive late, leading the host to lose sync with the datastore. : Incompatibility between the ESXi HBA drivers and

For the end-user, this error often manifests as a in a virtual machine or a failed "Power On" task. Because these systems are designed with concurrency in mind, a single failure is usually handled by a retry mechanism . The host will refresh its cache, see the new value, and try the operation again. Because these systems are designed with concurrency in

Certain arrays may have issues correctly processing the SCSI COMPARE_AND_WRITE command used for ATS. Impact on the Environment This error is rarely benign and often leads to: ESXi host HBAs offline - Broadcom support portal

Wrap each block write in a lightweight STM transaction using the block’s read/write set. If any block fails the test-and-set, abort and retry all.