Administrator Guide

4. To close the confirmation panel, click OK.
Dedicated spares
The Manage Spares panel consists of two sections. The top section lists the current spares in the system and includes
information about each. The bottom section lists all the available disks that can be designated as spares and includes details
about each disk. If you selected a linear disk group, this section displays disks that can be used as dedicated spares for the
selected disk group.
Click individual disks within the table to select them. Filter the disks in the list per disk description, location, or disk size by
entering applicable search criteria in the text box. Clear the filter by clicking the Clear Filters button.
Disk groups support both 512n and 512e disks. However, for consistent and predictable performance, do not mix disks of
different rotational speed or sector size types (512n, 512e). For more information about disk groups, see About disk groups.
Add dedicated spares
1. In the Pools topic, select the linear pool for the disk group that you are modifying in the pools table. Then, select the disk
group in the Related Disk Groups table.
2. Select Action > Manage Spares. The Manage Spares panel opens.
3. Check the Assign dedicated spares to the disk group box, then select the disk group in which you want the dedicated
spare to reside.
4. In the Add New Spares section, click on available disks to select them.
5. Click Add Spares. The system updates the dedicated spares and a confirmation panel appears.
6. To close the confirmation panel, click OK.
Create a volume
You can add volumes to virtual pools and linear disk groups. Use the Create Virtual Volumes panel or the Create Linear Volumes
panel to create volumes. You can access the panels from either the Pools and Volumes topics.
1. In the Pools topic, select a pool in the pools table.
NOTE:
To see more information about a pool, hover the cursor over the pool in the table. See Viewing pools for more
details about the Pool Information panel that appears.
2. Select a disk group in the Related Disk Groups table.
3. Select Action > Create Volumes.
The Create Virtual Volumes or Create Linear Volumes panel opens, depending on the type of disk group that you selected.
For more information about creating virtual volumes, see Create a virtual volume. For more information about creating linear
volumes, see Create a linear volume.
Changing pool settings
Each virtual pool has three thresholds for page allocation as a percentage of pool capacity. You can set the low and middle
thresholds. The high threshold is automatically calculated based on the available capacity of the pool minus 200 GB of reserved
space.
NOTE:
If the pool size is 500 GB or smaller, or the middle threshold is relatively high or both, the high threshold may not
guarantee 200 GB of reserved space in the pool. The controller cannot automatically adjust the low and middle thresholds in
such cases.
You can view and change settings that govern the operation of each virtual pool:
● Low Threshold: When this percentage of virtual pool capacity has been used, informational event 462 is generated to notify
the administrator. This value must be less than the Mid Threshold value. The default is 50 percent.
● Mid Threshold: When this percentage of virtual pool capacity has been used, event 462 is generated to notify the
administrator to add capacity to the pool. This value must be between the Low Threshold and High Threshold values. The
Working in the Pools topic
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