NetBackup 10.0 removes support for direct backup to storage units (non-SLP) in ISM policies
Starting with NetBackup 10.0, support for direct backup to non-SLP storage units in Integrated Storage Manager (ISM) policies has been removed.
ISM backups fail with a 1630 status code if an ISM policy attempts to use non-SLP storage as a backup destination. Before upgrading to NetBackup 10.0, switch all your existing ISM policies to use SLPs instead.