Dell PowerVault MD3660i CLI Guide - Page 38

The freeCapacityArea parameter defines the free capacity area to use for the virtual disk. If a disk group has several free capacity areas, you can use this parameter to identify which free capacity area to use for virtual disk creation. You do not have to assign the entire capacity of the physical disks to the virtual disk. Assign any unused space to another virtual disk at another time. The userLabel, capacity, owner, and segmentSize parameters are the same as in the previous versions of the create virtualDisk command. Enclosure Loss Protection The enclosureLossProtect parameter is a boolean switch that turns enclosure loss protection on or off. To work properly, each physical disk in a virtual disk group must be in a separate enclosure. Enclosure loss protection is set under the following conditions: • You assign the physical disks. • The RAID controller module assigns the physical disks. The following table shows possible results for the enclosureLossProtect parameter. The results depend on whether you assign the physical disks or the RAID controller module assigns the physical disks. Method enclosureLossProtect= TRUE enclosureLossProtect=FALSE You assign the physical disks. If you select more than one physical disk from any one enclosure, the storage array returns an error. The storage array performs the operation, but the created disk group does not have enclosure loss protection. The RAID controller module firmware assigns the physical disks. The storage array posts an error if the RAID controller module firmware cannot provide physical disks to ensure that the new disk group has enclosure loss protection. The storage array performs the operation even if it means that the disk group might not have enclosure loss protection. The enclosureLossProtect parameter is not valid when creating virtual disks on existing disk groups. Using The Auto Configure Command The autoConfigure storageArray command creates the disk groups on a storage array, the virtual disks in the disk groups, and the hot spares for the storage array. When you use the autoConfigure storageArray command, define the following parameters: • Type of physical disks (Serial Attached SCSI [SAS]) • RAID level • Number of physical disks in a disk group • Number of disk groups • Number of virtual disks in each disk group • Number of hot spares • Size of each segment on the physical disks After defining these parameters, the MD Storage Manager automatically creates the disk groups, virtual disks, and hot spares. The RAID controller modules assign disk group and virtual disk numbers as they are created. After MD Storage Manager creates the initial configuration, you can use the set virtualDisk command to define virtual disk labels. Before running the autoConfigure storageArray command, run the show storageArray autoConfigure command. The show storageArray autoConfigure command returns a list of parameter 38