普通Lan-free备份的话，需要看你的备份介质是什么，如果是disk，就没有必要配置SSO，如果是备份到Tape上面，且需要多台备份客户端共享全部的Drivers，则需要配置SSO的。
我不会添加附件，你可以参考网站下载相关文档。
About the Shared Storage Option
The Shared Storage Option allows multiple NetBackup media servers to share
individual tape drives (standalone drives or drives in a robotic library). NetBackup
automatically allocates and unallocates the drives as backup and restore operations
require.
The Shared Storage Option is a separately licensed and a separately purchased
NetBackup software option that allows tape drive sharing. The license key is the
Shared Storage Option key.
The Shared Storage Option is required only if multiple hosts share drives. For
example, multiple NDMP hosts may share one or more drives.
The Shared Storage Option requires appropriate hardware connectivity, such as
Fibre Channel hubs or switches, SCSI multiplexors, or SCSI-to-fibre bridges.
You can use Shared Storage Option in the following environments:
■ Fibre Channel SANs
■ Environments that do not use Fibre Channel, such as SCSI switches or
multi-initiator configurations