Summary
You are attempting to run a selective file restore from NetApp storage. The job fails referring to OSSV_NEGOTIATION_ERR. The restore job attempted to use iSCSI to mount to data and this failed. The job attempted to fall back to OSSV protocol and then also failed.
Symptoms
The restore job fails and the error printed to the job log are similar to:
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_WARNING), text(iSCSI restore failed. Continue restoring using OSSV protocol...)
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_WARNING), text(OSSVNegotiateRestoreRequest() failed:[OSSV_NEGOTIATION_ERR][Request not allowed by source system].)
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_WARNING), text(restore failed requesting [BEXIMAGE.TOC] from Secondary.)
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_WARNING), text(restore failed restoring rawtoc table file:[BEXIMAGE.TOC][C:/PROGRA~1/DPX/logs/bexsv2788_8367753]. Continuing with direct file restore...)
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_NORMAL), text(Done parsing [C_.F_.0.refs-restore] for [2] restore records. )
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_NORMAL), text(Restoring file [VMware/Drivers/vmci] into [C:/RESTORE/]...)
Task 1 NDMP_LOG: id(2,788), type(NDMP_LOG_WARNING), text(OSSVNegotiateRestoreRequest() failed:[OSSV_NEGOTIATION_ERR][Request not allowed by source system].)
The important parts to note are the iSCSI mount of the data failed and that ossv protocol cannot recover data when there is not file history data as part of the backup.
Resolution
The restore destination did not have the iSCSI initiator service running.
To perform the selective file restore, enable iSCSI service on the restore host.
Full-volume restore will also fail. In this case, iSCSI restore is skipped in favor of ossv protocol restore, and the requisite parts needed to recoverd the data via ossv are not available.