For the retry, when the scheduler requests the storage unit with the greatest available capacity, note the following:

• A tape storage unit in the storage unit group has preference over any disk storage units since tape storage units usually have more capacity.

• If the storage unit with the most unused capacity is busy, NetBackup skips it. NetBackup then selects an available storage unit with the next largest, unused capacity.

• If the storage unit with the greatest unused capacity is the one that lacked capacity when the job first failed, the scheduler tries it again. That storage unit may have more unused capacity now than it did when the job failed.

• Either free sufficient space or add more space to the file system for this storage unit.

• Lower the high capacity mark for this disk storage unit. Configure the policies to access it through a storage unit group that provides alternative storage to use when this storage unit fills up. Ideally, if an image exceeds the file system's high capacity mark, it also completes successfully. This image leaves the storage unit in a full state (over the high capacity mark). The storage unit then is not assigned to other jobs until its capacity falls under its high capacity mark.

• If the Staging attribute is set on the disk storage unit that did not have enough capacity, it may be unable to create free space. It cannot create space because the backups that are staged to the disk are not relocated (eligible to be deleted from the staging storage unit). Ensure that staging's relocation (duplication) jobs successfully copy enough images to provide sufficient free space for new backups.