During the execution of TC 3.7 Warm Migration on this new setup, the migration failed completely during the CopyDisks phase.

Unlike the previous issue where migration was stuck on consolidation, this attempt failed with a critical authentication error, and the importer pod logs indicate that the expected snapshot could not be found on the source VM.

Steps to Reproduce

1. Environment: New source VM (ibm-fio-1tb-warm) created on IBM iSCSI Storage (PerfTest_VC7_1_ISCSI_17TB_IBM).

1. Plan: Warm Migration TC 3.7 initiated.

1. Phase: CopyDisks (specifically attempting to process checkpoint 3174-snapshot-2).

1. Failure: The importer pod failed to transfer data and exited immediately.

Observed Error

1. Migration Status Error (CR):
YAML
 

phase: CopyDisks
reasons:
- 'Unable to process data: Unable to transfer source data to target file:
  ServerFaultCode: The session is not authenticated.' 

full logs path :  /home/kni/Tzahi_MTV/mtv-debug-1vm-ibm-1tb-366gb-usage-dynamic-fio-warm-tc3-7-20260128-093013