HP 3PAR InForm OS 3.1.1 CIM API (QL226-96591, July 2012)

Before Volume Creation
Now the total raw capacity of the all-FC concrete pool is 813896302592 bytes (776192 MB).
The Overhead/Metadata used in the creation of the concrete pool (for example, TOC) can be
inferred by the difference between this value and
TPD_AllocatedFromStoragePool.SpaceConsumed between the primordial and concrete
pools. Because at this point there are no volumes in the array, the capacity that is free for creating
volume is the same as the total raw capacity of the concrete pool.
Concrete TPD_StoragePool.TotalManagedSpace = 813896302592 (raw capacity of the concrete
pool)
Metadata used in creating “all-FC” concrete pool = TPD_AllocatedFromStoragePool.SpaceConsumed
– Concrete TPD_StoragePool.TotalManagedSpace = 923699114496 - 813896302592 =
109802811904 (~104716 MB)
Concrete TPD_StoragePool.RemainingManagedSpace = 813896302592 (raw capacity that can
be used to create volume)
After Volume Creation
Suppose a RAID-10 volume of logical size 10240 MB is created from all-FC pool. This value is
represented in the TPD_StorageVolume class as ConsumableBlocks. In InForm OS release
2.3.1, the NumOfBlocks also represents the logical size of the volume. Because this is a RAID-10
volume, its raw size is actually double that of the logical size, for example, 20480 MB. This value
is represented in the TPD_StorageVolume class as NumberOfBlocks (InForm OS 2.2.4 and
prior) and NumberOfRawBlocks (InForm OS 2.3.1) the raw capacity consumed from the concrete
pool in creating this volume is the same as the raw size of the volume, and this capacity is deducted
from the RemainingManagedSpace of the concrete pool.
BlockSize = 512
• TPD_StorageVolume.NumberOfBlocks = TPD_StorageVolume.ConsumableBlocks
= (10240 * 1024 * 1024) / BlockSize = 20971520 (logical size of the volume).
• TPD_StorageVolume.NumberOfRawBlocks = (20480 * 1024 * 1024) / BlockSize =
41943040 (raw size of the volume).
• TPD_AllocatedFromStoragePool.SpaceConsumed between concrete “all-FC” pool
and volume = TPD_StorageVolume.NumberOfRawBlocks * BlockSize = 21474836480
(raw space consumed from concrete pool in the creation of the volume).
• Concrete TPD_StoragePool.RemainingManagedSpace = previous
RemaningManagedSpace value – volume raw size = 813896302592 – 21474836480
= 792421466112.
The TotalManagedSpace for the concrete pool remains unchanged.
Fully Provisioned Storage Volume
For a DynamicStoragePool, since it is a RAID-specific storage pool, logical user capacity is
used in calculating its ManagedSpace as well as SpaceConsumed with its child pools/volumes.
All DeltaReplicaStoragePools that are allocated from a DSP, use logical user capacity in
calculating TotalManagedSpace and RemainingManagedSpace. RAID and other types of
overhead are hidden in the SpaceConsumed between concrete pool and the DSP.
TPD_AllocatedFromStoragePool.SpaceConsumed between the parent dynamic storage
pool and the storage volume represents the actual size allocated to the volume, and is equal to
TPD_StorageVolume.NumberOfBlocks multiplied by TPD_StorageVolume.BlockSize.
This is also the usable size of the volume in blocks. Raw size of the volume is represented by
TPD_StorageVolume.NumberOfRawBlocks. Unlike the case for legacy storage volume,
SpaceConsumed between DynamicStoragePool and StorageVolume is not the raw size
40 CIM API SMI-S Support