The Arithmos service is the core component responsible for data protection orchestration in Nutanix, managing protection policies, schedules, and replication tasks. The alert VolumeGroupProtectionFailed directly indicates a failure within this data protection workflow. Therefore, the arithmos.ERROR log, which specifically captures critical error messages from the Arithmos service, is the most appropriate and direct place to investigate the root cause of the protection failure. Reviewing this log will provide detailed information on why the data protection job for the volume group did not succeed.

A. solver.log: This log is for the Solver service, which is part of the Cluster Resource Manager (CRM). It handles resource placement and load balancing, not data protection replication orchestration.

1. Nutanix Prism Central Guide (pc-v2023.3): In the "Prism Central Services" section

Arithmos is described as the service responsible for "protection policy and recovery plan orchestration." This directly links the service to the function mentioned in the alert.

2. Nutanix Support Portal - KB-4590

"NCC Health Check: arithmoschecks": This knowledge base article details health checks for the Arithmos service

stating it is "responsible for managing Data Protection." This confirms that failures in data protection are investigated through Arithmos.

3. Nutanix Troubleshooting Guide (v6.5): The section on "Log Collection and Examination" maps services to their log files. It specifies that logs beginning with arithmos (including arithmos.ERROR) belong to the Arithmos service

which manages data protection policies.