User's Guide

Chapter 6 Storage Networking
About the Storage Networking License
Scalar i500 User’s Guide 150
About the Storage Networking License
If you purchase a Storage Networking (SNW) license after you purchase
your library, you must install the license key on your library to enable the
SNW functionality.
The SNW license is sold on a per-drive basis. The license installed on the
library indicates the number of tape drives that are licensed.
If you purchase an SNW license for a particular number of tape drives
and later want to license more drives, you must purchase additional
SNW licenses.
The licenses are not tied to specific tape drives, but to how many tape
drives are currently using SNW features. If you remove all SNW features
from a tape drive, then the license becomes available to use on another
tape drive.
For more information on licensing, see Obtaining and Installing a License
Key on page 88.
Configuring Control Path Failover
If an HP LTO-5 FC tape drive is the control path for a partition, you can
select another HP LTO-5 FC tape drive in that partition for control path
failover. This means that if the control path tape drive fails, the failover
tape drive becomes the control path for the partition. The failed-over tape
drive remains the control path for the partition unless it fails or the
library is restarted. When either of these events occurs, the library starts
over and attempts to use the original control path tape drive as the
control path, and the original failover tape drive for failover.
Details about control path failover include:
• The SNW license must be sufficient to cover both the control path
and failover tape drives in order to enable a tape drive for failover.
• The control path and failover tape drives must both be HP LTO-5
Fibre Channel tape drives.