Storage-specific API logging could be enabled via one of the following registry values. You need to enable only one that is specific to your storage. Please create them on the Veeam machine where Veeam Backup Service is running:
HPE 3PAR StoreServ:
Name: LogWsApiFullDetails
Type: REG_DWORD
Value: 1
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication\
NetApp FAS, FlexArray (V-Series), Edge VSA and IBM N Series (NetApp FAS OEM)
Name: NetAppDetailedLogging
Type: REG_DWORD
Value: 1
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication\
Nimble Storage AF-Series and CS-Series
Name: NimbleAPILogDetails
Type: REG_DWORD
Value: 1
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication\
Dell EMC VNX, VNX2, VNXe and Unity
Name: VNXAPILogDetails
Type: REG_DWORD
Value: 1
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication\
Cisco HyperFlex
CiscoHXLogRestAPI
Type: REG_DWORD
Value: 1
Path: HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication\
