The procedure to expand the sub-pool capacity of the Tier pool is as follows:
On the global navigation tab, click Storage.
The registered ETERNUS Disk storage systems are displayed on the Main pane.
On the Main pane, click the target ETERNUS Disk storage system.
On the Category pane, click Automated Storage Tiering.
The items of the Category pane change into the items concerning Automated Storage Tiering.
On the Category pane, click Tier Pool.
The registered Tier pools are displayed on the Main pane.
On the Main pane, click the target Tier pool.
The details about the selected Tier pool is displayed on the Main pane.
On the Main pane, select Sub-Pool tab.
The sub-pool information is displayed on the Main pane.
On the Main pane, check the target sub-pool radio button.
On the Action pane, click Expand Sub-Pool Capacity under Sub-Pool.
The information confirmation screen for the target Tier pool is displayed. Only the following items can be changed though the current configuration is displayed on this screen.
Assigned CM
Disk Selection
Enter the necessary information, and then click Next.
The sub-pool information input screen is displayed.
Enter the necessary information, and then click Next.
The information confirmation screen is displayed. Confirm the information, and then click Expand.
Point
If Balancing:Level for the Tier pool is "Middle" or "Low" after performing the sub-pool capacity expansion, start the Tier pool balancing.
Note
If any of the following conditions are satisfied, the Balancing checkbox becomes inactive (cannot be checked):
Pool Status of the target Tier pool is not "Available", "Partially Readying", or "Exposed".
Operating Status of the target Tier pool is "Start".
Balancing:Status of the target Tier pool is "Active" or "Error".
A Tier pool of an ongoing Tier pool balancing exists within the storage device.
FTVs do not exist in the target Tier pool.
If a Tier pool balancing is performed simultaneously with a sub-pool capacity expansion, the process may take some time to complete. It may take a few minutes to a few hours depending on the usage capacity of each sub-pool within the Tier pool and the number of FTVs. If the usage capacity of each sub-pool and the number of FTVs are high, the process time should be taken into consideration when operating.
