Compaq StorageWorks 6000 - Virtual Library System Guide de l'utilisateur télécharger pdf (Page 148)

6. 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

7. 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

8. When you are finished configuring the Fibre Channel ports, click Apply Settings.

9. Restart the VLS device emulations to make the changes take effect. See “Restarting VLS Device

Emulations” on page 172.

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.

NOTE:

Using oversubscription, you run the risk of running out of physical storage capacity and requires

careful planning of your storage needs and a review of your current storage policy.

Enabling and Disabling Oversubscription

To enable oversubscription:

In Command View VLS:

1. Select the System tab.

2. Select Chassis in the navigation tree.

The chassis details window opens.

3. In the Oversubscription section, select Enabled.

4. The Notify when storage capacity is [x] % Full box defaults to 90. You may change the value or

leave it at 90.

This percentage value is the threshold of storage space consumed that when reached triggers a

storage capacity notification alert. If this threshold is set to zero (0), an alert will be sent only

when existing capacity has been reached.

5. Click Apply Settings.

To disable oversubscription, deselect the Enabled box.

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Compaq StorageWorks 6000 - Virtual Library System Guide de l'utilisateur Page 148