Total Disk Capacity and Usage in TPD_DiskDrive Class

[Negin]

I want to read disk capacity and usage via CIM classes including `TPD_DiskDrive`. I can find the following properties according to HPE 3PAR API Reference:

[Description ("Size of the chunk.") ]
uint64 ChunkSize;
[Description ("Number of Normal Used OK chunks.") ]
uint32 ChunksNormalUsedOK;
[Description ("Number of Normal Used Fail chunks.") ]
uint32 ChunksNormalUsedFail;
[Description ("Number of Normal Unused Free chunks.") ]
uint32 ChunksNormalUnusedFree;
[Description ("Number of Normal Unused Uninitialized chunks.") ]
uint32 ChunksNormalUnusedUninit;
[Description ("Number of Normal Unused Fail chunks.") ]
uint32 ChunksNormalUnusedFail;
[Description ("Number of Spare Used OK chunks.") ]
uint32 ChunksSpareUsedOK;
[Description ("Number of Spare Used Fail chunks.") ]

uint32 ChunksSpareUsedFail;
[Description ("Number of Spare Unused Free chunks.") ]
uint32 ChunksSpareUnusedFree;
[Description ("Number of Spare Unused Uninitialized chunks.") ]
uint32 ChunksSpareUnusedUninit;
[Description ("Number of Spare Unused Fail chunks.") ]
uint32 ChunksSpareUnusedFail;

And I read the total capacity using `MaxMediaSize` property inherited from the parent class, `CIM_DiskDrive`. But in one of my disks I have`ChunksNormalUsedOK=~3500` while `MaxMediaSize =~3000GB` and the disk is working normally. How is this possible?

- Am I reading the proper value for disk capacity?

- Can I sum up the chunk numbers and multiply it by chunksize to get the total disk capacity?

Thank you

[veeyarvi]

Hi Negin,

On page 96 (Table 86),  it talks about 'TPD_DiskStorageExtent' which talks about "Provides capacity information for disk drives". Did you get a chance to explore this?

Regards,
Veeyaarvi

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