Class CIM_CompositeExtentBasedOn


CIM_Dependency
\_CIM_BasedOn


Description

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.

Subclasses

IBMTSDS_ArrayBasedOnArraySiteExtent IBMTSDS_ArraySiteBasedOnDiskExtent IBMTSDS_RankBasedOnArrayExtent IBMTSDS_RankBasedOnDiskExtent

Referenced By


Properties

IdTypeRangeDescription
Key
Antecedent CIM_ManagedElement
Antecedent represents the independent object in this association.
Dependent CIM_ManagedElement
Dependent represents the object that is dependent on the Antecedent.
Read Only
BlockSize uint64
The 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.
LBAMappingIncludesCheckData boolean
True 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.
LBAsMappedByDecrementing boolean
True 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.
NumberOfBlocks uint64
The 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.
OrderIndex uint16
Order 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 specifiedas 1, 2 and 3 to indicate the order in which the disk Extents are used to access the RAID data.
UnitsBeforeCheckDataInterleave uint64
Number of bytes of user data to skip before starting the check data interleave.
UnitsOfCheckData uint64
Number of bytes to be reserved for check data.
UnitsOfUserData uint64
Number of bytes to be reserved for user data.
UserDataStripeDepth uint64
Number 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.
Read Write
 
Inherited from class CIM_BasedOn
EndingAddress, OrderIndex, StartingAddress
 

Method Summary

NameDescription
 

Method Detail