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3.
Select Chassis in the navigation tree.
The chassis details window opens
Figure 34 Chassis details window
4.
Click the Enabled box to select it.
5.
Enter a percentage value in the Storage Capacity Alert box.
This percentage value is the threshold of available storage space remaining that when reached will
trigger 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.
6.
Click Apply Settings.
To disable oversubscription, click the Enabled box to deselect it.
NOTE:
Oversubscription cannot be disabled while cartridge capacity is oversubscribed.
Managing virtual device LUNs
The VLS has a LUN masking, a LUN mapping, and a port mapping feature that allows you to restrict host
access to the LUNs (virtual libraries and tape drives) configured on the VLS, manually assign LUN numbers
to the virtual devices by host, and assign each virtual device to a specific FC host port. These features
allow you to allocate the virtual devices to individual hosts and distribute the virtual tape drives across the
FC host ports to achieve maximum bandwidth. See
By default, the VLS allows all hosts connected to the VLS through the SAN to access all virtual devices
configured on the VLS. Also, the VLS software manages the LUN mapping so that the virtual device LUN
assignments always meet operating system requirements and restrictions. See
Operating system LUN requirements and
virtual devices using the LUN masking feature then, for each LUN masked host, to use the LUN mapping
feature to manually assign LUN numbers to any virtual devices you want the host to be able to access.
See
LUN masking
Port mapping is required and allows you to assign each virtual device to one of the FC host ports or a
pair of FC host ports (if your backup solution supports this).
68
Configuration
(Figure
restrictions. Optionally, you can restrict host access to individual
and
LUN mapping
for reasons you may want to use these features.
34).
Managing high availability
for more information.
Default LUN numbering
and
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