Test And Set Of Disk Block Returned False For Equality [hot]: Atomic

pcs status crm_verify -L -V pcs cluster cib | grep reservation

When the storage layer lies about a simple comparison, distributed systems start to hallucinate. pcs status crm_verify -L -V pcs cluster cib

When this error appears in logs (common in environments like VMware ESXi, Linux LVM, or clustered filesystems), it usually stems from one of the following: 1. Multi-Host Contention (Split Brain) Caution: Only clear reservations if you are certain

Therefore, the root cause is almost always in the or stale cache invalidation . Impact on Operations When this error occurs, you

Caution: Only clear reservations if you are certain no active node holds them.

In clustered environments (like VMware VMFS datastores), hosts use ATS as a "heartbeat" to tell other hosts they are still alive. If the network between the host and the storage has high latency or dropped packets, the update might arrive late or out of sync, causing the "equality" check to fail because the host is working with stale metadata. Impact on Operations When this error occurs, you will typically notice:

: If another host has modified that same block, or if extreme latency caused a previous update to be delayed/retried, the "test" part of the command fails because the current disk image differs from the host's in-memory image.