Managing Oversubscription; Fibre Channel Host Ports Window - HP StorageWorks 9000 - Virtual Library System User Manual

5. Select Fibre Channel in the navigation tree.
The Fibre Channel Host Ports window opens
Figure 46 Fibre Channel Host Ports window
.
6. Enter a value for the Loop ID in the Loop ID Preferred box for each Fibre Channel host port to
use for prioritizing communication requests with the VLS.
If the Fibre Channel host port's topology is Fabric, the Loop ID value is ignored.
7. Select the Fibre Channel host port's topology in the Topology Preferred box for each Fibre Channel
host port.
Auto—Allows the VLS to determine the Fibre Channel port's topology
Loop—Sets the topology type to an arbitrated loop
Fabric—Sets the topology type to fabric
8. Select a link speed in the Link Speed Preferred box for each Fibre Channel host port.
Auto—Allows the VLS to determine the Fibre Channel port's link speed
1—1 Gb per second
2—2 Gb per second
4—4 Gb per second
9. When you are finished configuring the Fibre Channel ports, click Apply Settings.
10. Restart the VLS device emulations to make the changes take effect. See
"Restarting VLS Device

Managing Oversubscription

Because the VLS dynamically allocates storage space as data is written to virtual media, the VLS
allows you to allocate more cartridge capacity than is physically installed. This feature, called
oversubscription, permits configuring your system for anticipated storage growth; configure cartridges
beyond your current capacity and then seamlessly add physical storage later.
By default, oversubscription is disabled.
156 Configuration
(Figure
Emulations" on page 187.
46).