Array Capacity & Utilization (IBM SVC View)

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Capacity Manager > Array Capacity & Utilization > Array Capacity & Utilization

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The following illustration represents an example of the view available for IBM SVC.

See How IBM SVC Capacity Values Are Derived.

See Array Capacity & Utilization (HP 3PAR View).

Table: Array Capacity & Utilization (IBM SVC View)

Column name	Description
Storage Array	The name that you assigned to the array. Available values include all supported storage arrays.
Family	The family classification of the storage array as assigned by the vendor. Use this name to ascertain the vendor's product specifications.
Type	The specific model of the storage array.
Vendor	The name of the vendor that distributes the storage array.
Product	The name of the product, typically shown as a series number or alphanumeric string. This field provides an indicator of capacity specifications, such as LUNs, hosts per array, and drives per array.
# Nodes	Number of SAN Volume Controllers, the providers of virtualization to the SAN.
# Ports	The number of ports in the array. Click the value to view the Array Port Utilization.
Total Free Space	The currently available space in the cluster. This is approximately backend storage capacity minus allocated capacity. Indicates the sum of the free capacity for the mdisk group.
% RAID Loss	This value represents the amount of space lost to RAID overhead. It includes mirroring and other overhead usage. The value is derived using the following: (non-primary mirror extents + managed MDisks) - ((MDisk Group real capacity - MDisk Group remaining managed space)/MDisks Total)
# Hosts	The total number of unique hosts that have LUNs assigned by this storage array, and the hosts have been successfully queried using one or more host resource policies. If zero, host resources data has not been collected. See Host Capacity & Utilization .
Host Usage	Links to the LUN Utilization Summary. See LUN Utilization Summary .
% Host Usage	The percentage of the total capacity that is being used by hosts
# Disks	The number of physical disks for this storage array. Links to the Disk Summary report for additional information.
Capacity	Total physical capacity. This is populated as physical capacity from the Issystem CLI. For certain models, when physical capacity is not available, it is calculated as the sum of all the drives capacity.
Allocated	Allocated storage is physical storage consumed, including parity overhead and system overhead. A gap between raw and allocated capacity may indicate unused capacity. This is calculated as physical capacity minus physical free capacity as obtained from Issystem CLI when available.
Hot Spare	Total capacity of hot spare drives.
Available	Total raw capacity of the array that has not been allocated. The size is displayed in the units you selected with the Advanced option when you generated the report.
% Available	Expressed as a percentage, total capacity of the array/cluster that has not been assigned to a host and that is available for provisioning. This percentage is a better capacity indicator than the number shown as Available Size.
Raw Usage	Expressed as a percentage, total capacity of the LUNs in the array that have been assigned to a host and that are not available for provisioning.
#MDisks	The number of MDisks associated with this array.
Total MDisk Capacity	Total MDisk (block storage) capacity
Managed Space	MDisks that are in Managed mode; click on the #MDisks to view the IBM SVC MDisk Summary, which lists the MDisks and modes
UnManaged Space	MDisks that are in UnManaged mode; click on the #MDisks to view the IBM SVC MDisk Summary, which lists the MDisks and modes.
MDisk Usage	Expressed as a percentage, total capacity of the LUNs in the array that have been assigned to a host and that are not available for provisioning.
# MDisk Groups	The number of managed disk groups for the VDisks
Space in MDisk Groups	The capacity in the MDisk groups, derived from the SVC cluster pool capacity.
Space Allocated to VDisks	The amount of MDisk capacity that has been allocated to VDisks
Space Available in MDisk Groups	MDisk Group total capacity minus the space allocated to VDisks. Note that some space may be reserved for use by SVC.
MDisk Group Usage	Mouse over the thermometer to view the percentage, derived from the Total MDisk Capacity divided by the Managed Space.
# VDisks	The number of VDisks associated with this array
Total VDisk Copy Capacity	Virtual capacity, including mirrors
Total VDisk Capacity	Virtual capacity, excluding mirrors
Total Used Capacity	Total VDisk used capacity
% Over-Allocation	When this value is greater than 100%, it indicates that the VDisk is space-efficient. The percentage represents the ratio of virtual to real capacity.
# VDisks Allocated to Hosts	The number of VDisks allocated to hosts
Alloc VDisk Capacity	The amount of VDisk capacity that has been presented to hosts
# VDisks Unallocated	The number of VDisks that have yet to be presented to hosts
UnAlloc VDisk Capacity	The amount of VDisk capacity that has yet to be presented to hosts
VDisk Usage	Mouse over the thermometer to view the percentage, derived from the Total Used Capacity divided by the Total VDisk Copy Capacity

Array Capacity & Utilization (IBM SVC View)

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