Chapter 6. Storage pools 221
Custom configuration
Select Internal Custom to customize the configuration of MDisks made out of internal drives. 
The following values can be customized:
/SM590000RAID level
/SM590000Number of spares (or spare areas)
/SM590000Array width
/SM590000Stripe width
/SM590000Number of drives of each class
Figure 6-41 shows an example with nine drives ready to be configured as DRAID 6, with the 
equivalent of one drive capacity of spare (distributed over the nine disks).
Figure 6-41   Adding internal storage to a pool by using the Advanced option
To return to the default settings, click the Refresh button next to the pool capacity. To create 
and assign the arrays, click Assign.
Unlike automatic assignment, custom internal configuration does not create multiple arrays. 
You must create each array separately.
As with automatic assignment, the system does not allow you to add significantly different 
arrays to an existing and populated pool. The goal is to achieve balance across MDisks inside 
one pool. You can still add any array of any configuration to an existing pool by using the CLI. 
Note: When Internal Custom configuration is performed, spare drives are not assigned 
when traditional RAID arrays are created. You need to set them up manually.