Class CIM_CompositeExtentBasedOn
extends CIM_BasedOn

This specialization defines how data is striped across StorageExtents. Additionally, it includes information on distribution of check data so that the 'usual case' RAID devices can be created in one step.

Class Hierarchy

CIM_Dependency
   |
   +--CIM_BasedOn
   |
   +--CIM_CompositeExtentBasedOn

Direct Known Subclasses

None.

Class Qualifiers

NameData TypeValueScopeFlavors
AssociationbooleantrueNone OVERRIDABLE= false
DescriptionstringThis specialization defines how data is striped across StorageExtents. Additionally, it includes information on distribution of check data so that the 'usual case' RAID devices can be created in one step.None TRANSLATABLE= true
Versionstring2.7.0TOSUBCLASS= falseTRANSLATABLE= true

Local Class Properties

NameData TypeQualifiers
NameData TypeValueScopeFlavors
BlockSizeuint64
DescriptionstringThe Dependent's BlockSize is limited by the Antecedent's. In SCC, this is equivalent to the NUMBER OF BYTES PER LBA_PS field in the RedundancyGroup P_Extent Descriptor.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Protected Space Extent|001.4None None
ModelCorrespondencestringCIM_StorageExtent.BlockSizeNone None
UnitsstringBytesNone TRANSLATABLE= true
EndingAddressuint64
DescriptionstringEndingAddress indicates where in lower level storage, the higher level Extent ends. This property is useful when mapping non-contiguous Extents into a higher level grouping.None TRANSLATABLE= true
LBAMappingIncludesCheckDataboolean
DescriptionstringTrue if the logical block mapping algorithm includes check data bytes. This property corresponds to the NOCHKSKIP attribute in the SCC-2 Volume Set PS_Extent Descriptor.None TRANSLATABLE= true
LBAsMappedByDecrementingboolean
DescriptionstringTrue if logical blocks in the underlying StorageExtents are mapped in decrementing order. This property corresponds to the INCDEC value in the SCC-2 Volume Set PS_Extent Descriptor.None TRANSLATABLE= true
NumberOfBlocksuint64
DescriptionstringThe total number of blocks that will be consumed on the Dependent Extent. This is limited by the Antecedent's NumberOfBlocks, but is included explicitly to provide for the DMTF MIF mapping. In SCC, this is equivalent to the NUMBER OF LBA_PS(s) field in the Volume Set PS_Extent Descriptor.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Protected Space Extent|001.3None None
ModelCorrespondencestringCIM_StorageExtent.NumberOfBlocksNone None
OrderIndexuint16
DescriptionstringOrder matters to CompositeExtents. An example of the use of this property is when defining a RAID-0 striped array of 3 disks. The resultant RAID array is a CompositeExtent that is dependent on (as described by CompositeExtentBasedOn) the StorageExtents that represent each of the 3 disks. The OrderIndex of each CompositeExtentBasedOn association from the disk Extents to the RAID array could be specified as 1, 2 and 3 to indicate the order in which the disk Extents are used to access the RAID data.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Protected Space Extent|001.1None None
OverridestringOrderIndexNone OVERRIDABLE= false
RequiredbooleantrueNone OVERRIDABLE= false
StartingAddressuint64
DescriptionstringStartingAddress indicates where in lower level storage, the higher level Extent begins.None TRANSLATABLE= true
UnitsBeforeCheckDataInterleaveuint64
DescriptionstringNumber of bytes of user data to skip before starting the check data interleave.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Physical Extent|001.6None None
UnitsstringBytesNone TRANSLATABLE= true
UnitsOfCheckDatauint64
DescriptionstringNumber of bytes to be reserved for check data.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Physical Extent|001.7None None
UnitsstringBytesNone TRANSLATABLE= true
UnitsOfUserDatauint64
DescriptionstringNumber of bytes to be reserved for user data.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Physical Extent|001.8None None
UnitsstringBytesNone TRANSLATABLE= true
UserDataStripeDepthuint64
DescriptionstringNumber of bytes which form the stripe size for the Dependent StorageExtent. If the CompositeExtent is concatenated instead of striped, then UserDataStripeDepth should be set to zero.None TRANSLATABLE= true
MappingStringsstringMIF.DMTF|Protected Space Extent|001.6None None
UnitsstringBytesNone TRANSLATABLE= true

Association References

NameClass OriginReference Class
AntecedentCIM_CompositeExtentBasedOnCIM_StorageExtent
DependentCIM_CompositeExtentBasedOnCIM_CompositeExtent