Hi quebek !
Thank you so much for your reply. Indeed, the rescan seems to be needed after performing the update. Here, I am puting the link and the extract from Netbackup Appliance Upgrade Guide (https://www.veritas.com/support/en_US/doc/113205077-152195715-0/v113639278-152195715)
Complete this step only if your backup environment includes SAN client computers.
The Fibre Channel (FC) ports must be re-scanned to allow any SAN client computers to reconnect to the Fibre Transport (FT) devices. The re-scan must be done from the NetBackup CLI view on the appliance.
To re-scan the FC ports:
Enter the following command to see a list of NetBackup user accounts:
Manage > NetBackupCLI > List
Log on to this appliance as one of the listed NetBackup users.
Run the following command to rescan the FC ports:
nbftconfig -rescanallclients
If any SAN clients still do not work, run the following commands on each of those clients in the order as shown:
On UNIX clients:
/usr/openv/netbackup/bin/bp.kill_all
/usr/openv/netbackup/bin/bp.start_all
On Windows clients:
<install_path>\NetBackup\bin\bpdown
<install_path>\NetBackup\bin\bpup
If any SAN clients still do not work, manually initiate a SCSI device refresh at the OS level. The refresh method depends on the operating system of the client. Once the refresh has completed, attempt the nbftconfig -rescanallclients command again.
If any SAN clients still do not work, reboot those clients.
