198 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
Rename
Select Rename to modify the name of a storage pool. Enter the new name and click Rename 
in the dialog window.
To do it with the CLI, use the chmdiskgrp command. Example 6-3 shows how to rename 
Pool2 to StandardStoragePool. If successful, the command returns no output.
Example 6-3   Using chmdiskgrp to rename storage pool
IBM_Storwize:ITSOV7K:superuser>chmdiskgrp -name StandardStoragePool Pool2
IBM_Storwize:ITSOV7K:superuser>
Modify Threshold
The storage pool threshold refers to the percentage of storage capacity that must be in use 
for a warning event to be generated. When you use thin-provisioned volumes that 
auto-expand (automatically use available extents from the pool), monitor the capacity usage 
and get warnings before the pool runs out of free extents, so that you can add storage. 
To modify the threshold, select Modify Threshold and enter the new value. The default 
threshold is 80%. To disable warnings set the threshold to 0%.
The threshold is visible in the pool properties and is indicated with a red bar as shown in 
Figure 6-11.
Figure 6-11   Pool properties
To do it with CLI, use the chmdiskgrp command. You can specify the threshold not only with a 
percentage of the storage pool size, as you can through the GUI. Also, you can set an exact 
size. Example 6-4 shows warning threshold set to 750 GB for Pool0. 
Example 6-4   Changing warning threshold level with CLI
IBM_Storwize:ITSOV7K:superuser>chmdiskgrp -warning 750 -unit gb Pool0
IBM_Storwize:ITSOV7K:superuser>
Note: The warning is generated only the first time that the threshold is exceeded by the 
used-disk capacity in the storage pool.