Number of physical disks in a group
•With online and
•With the solid state drive disk type, the minimum number of physical disks is 6.
•If the number of disks is not specified when creating a disk group, the minimum is assigned. If the minimum number of disks is not available, the disk group cannot be created.
•There is no maximum number of physical disks.
Disk group occupancy and occupancy alarm level
The term occupancy refers to the amount of disk space being used for user data in a disk group.
There are two occupancy alarm levels:
•The warning level is the point (percent of capacity) at which the array issues a disk group allocation warning message. The default warning alarm level is 70% of capacity.
•The critical alarm level is the point (percent of capacity) at which the array issues a disk group allocation critical message. The default critical alarm level is 90% of capacity.
For example, if a disk group's capacity is 200 GB, and the default alarm levels are set, a warning is issued when the total capacity of the virtual disks in the disk group reaches 140 GB, and a critical message is issued when the total capacity of the virtual disks in the disk group reaches 180 GB.
If you change the occupancy alarm default values, the critical alarm level must be greater than the warning alarm level.
NOTE: HP P6000 Command View 9.x and earlier have a warning alarm level only. The default value is 90%.
Disk group capacity
Disk group capacity (in GB) is presented differently for different versions of HP XCS controller software.
XCS 6.xxx, and XCS 09xxxxxx
The maximum virtual disk size shown cannot exceed 2 TB, regardless of the total capacity.
•Total. Shows the formatted physical disk drive capacity of the disk group.
•Maximum Vdisk Size, Vraid0. Shows the largest virtual disk that could be created in the disk group, using Vraid0.
•Maximum Vdisk Size, Vraid1. Shows the largest virtual disk that could be created in the disk group, using Vraid1.
•Maximum Vdisk Size, Vraid5. Shows the largest virtual disk that could be created in the disk group, using Vraid5.
HP XCS 095xxxxx or later
The estimated capacity is based on factors, such as the estimated number and size of virtual disks that you might typically create. The actual total capacity can be more or less than the estimates. The maximum virtual disk size cannot exceed 32 TB, regardless of the total capacity.
•Total. Shows the formatted physical disk drive capacity of the disk group.
•Available, Vraid0. Shows the estimated capacity, if the entire disk group was used for Vraid0 virtual disks.
•Available, Vraid1. Shows the estimated capacity, if the entire disk group was used for Vraid1 virtual disks.
28 Provisioning storage