Chapter 6. Storage pools 193
You can create either an IOPS or bandwidth limit or both. You can use storage pool throttles 
to avoid overwhelming the back-end storage. Parent and child pool throttles are independent 
of each other. A child pool can have higher throttle limits than its parent pool.
In general, you manage storage as follows:
1. Create storage pools (standard or DRP), depending on your solution needs.
2. Add managed storage to pools by using one of the following options: 
– Create array MDisks out of internal drives or flash modules. 
– Assign MDisks provisioned from external storage systems to pools.
3. Create volumes on pools and map them to hosts or host clusters.
You manage storage pools either in the Pools pane of the GUI or with the CLI. To access the 
Pools pane, click Pools → Pools, as shown in Figure 6-2.
Figure 6-2   Accessing the Storage Pool pane
The pane lists all storage pools and their major parameters. If a storage pool has child pools, 
they are also shown.
To see a list of configured storage pools with CLI, run the lsmdiskgrp command without any 
parameters, as shown on Example 6-1.
Example 6-1   lsmdiskgrp output (some columns are not shown)
IBM_2145:ITSO-SV1:superuser>
id name  status mdisk_count vdisk_count capacity extent_size free_capacity 
0  Pool0 online 1           5           821.00GB 1024        771.00GB      
1  Pool1 online 1           5           7.21TB   4096        6.14TB        
6.1.1  Creating storage pools
To create a storage pool, you can navigate to Pools → MDisks by Pools and click Create 
Pool, or navigate to Pools → Pools and click Create, as shown in Figure 6-3.
Figure 6-3   Option to create a storage pool in the Pools pane.
Both alternatives open the dialog box that is shown in Figure 6-4 on page 194.