IBM Array Site Summary
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Capacity Manager > Array Capacity & Utilization> IBM Array Site Summary
Four or eight disk drive modules comprise an Array Site. Then, one or two Array Sites comprise an Array. An Array is an Array Site that has been formatted to a specific RAID format.
Understanding IBM Enterprise Storage Capacity Calculations
• Capacity values for IBM arrays may appear different from what is reported by the IBM CLI or IBM Tools, as IBM uses a decimal gigabyte—10^9 bytes, while StorageConsole uses 1024 for a KB when converting to GB.
• For FB open systems hosts, an extent is 1 GB. For CKD IBM zSeries or S/390 systems, an extent is 1 cylinder (.92 GB).
In the Scope Selector, you can narrow the report output by selecting values for the following criteria:
• State: Assigned, Unassigned, Unavailable
• Disk Classes: ENT, NL
Array Site | The Array Site ID |
Storage Array | The physical storage system; Drill down to the IBM Array Detail. |
DA Pair | Device adapter pair number—the physical I/O enclosure location. If the DA Pair is an even number, it indicates the first DA pair in the enclosure; an odd number indicates the second DA pair in the enclosure. |
Capacity | The capacity of all disks belonging to the Array Site |
# of Disks | Number of disks associated with this Array Site. Links to the IBM Disk Summary. |
Array Name | |
Disk RPM | The disk revolutions per minute, such as 10000 or 15000 |
State | assigned, unassigned, unavailable, initializing. Indicates if the array site is assigned to the array. If the state is unavailable, its capacity is not included in the total array capacity calculation, as shown in the Array Capacity and Utilization report. |
Disk Class | Enterprise fibre channel drives (ENT) or Nearline ATA drives (NL) |