3PAR CIM API Programming Reference for InForm OS 2.3.1 (320-200164 Rev B, February 2010)

5.49

Block Services Package

CIM API Programming Reference

5.9.6.4.2 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)

5.9.6.4.3 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

InForm OS 2.2.4 and prior:

 TPD_StorageVolume.NumberOfBlocks = (20480 * 1024 * 1024) / BlockSize = 41943040 (raw

size of the volume)

 TPD_StorageVolume.ConsumableBlocks = (10240 * 1024 * 1024) / BlockSize = 20971520

(logical size of the volume).

 TPD_AllocatedFromStoragePool.SpaceConsumed between concrete “all-FC” pool and

volume = TPD_StorageVolume.NumberOfBlocks * BlockSize = 21474836480 (raw space

consumed from concrete pool in the creation of the volume).