HP StorageWorks 6000 HP StorageWorks 6000-series Virtual Library System User G - Page 149

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. NOTE: Oversubscription cannot be disabled while cartridge capacity is oversubscribed. Shutdown at 98% Capacity The system displays warnings on the Notifications screen when the backend storage capacity consumed reaches the user-defined threshold (determined when you enabled oversubscription). Additional notifications are sent when the capacity consumed reaches 95% and again at 98%. At the level of 98%, the system will reject all attempts to write data from the backup application. Free up storage space or add more storage before reaching this point to ensure that no data is lost. All read operations remain unaffected. Once you reduce the capacity consumed to a level below the user-defined threshold, writes from the backup application resume automatically. However, if you reduce the capacity consumed to less than 98% but still above the threshold, you can manually resume writes by selecting Enable Writes (now visible) from the task bar of the Chassis status screen. When the storage capacity consumed exceeds the user-defined threshold, the system: • Displays warnings on the Notifications screen • Sends emails (if configured) to specified users • Sends alerts to the management consoles (if SNMP traps are configured) • Displays the Reclaim Space link on the Chassis status screen HP StorageWorks 149