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MSA 2050 - What is unallocated space/capacity displayed on the home page?

 
NathanM
Occasional Contributor

MSA 2050 - What is unallocated space/capacity displayed on the home page?

What is unallocated space/capacity displayed on the home page? How it is calculated?

 

3 REPLIES 3
Navaneetha1
HPE Pro

Re: MSA 2050 - What is unallocated space/capacity displayed on the home page?

Nathan M , 

Unallocated space is space that is designated for a pool but has not yet been allocated by a volume within that pool.

For Example :

You have total 5TB of physical space available.
Let us assume , you configure a DiskGroup in PoolA with 4TB capacity.

You have created 1 volumes in the PoolA with 3TB

4TB-3TB = 1TB is the unallocated space.

Please refer to SMU user guide for complete details :

https://support.hpe.com/hpsc/doc/public/display?docId=a00017707en_us
Page : 39

I am an HPE Employee

 

 

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NathanM
Occasional Contributor

Re: MSA 2050 - What is unallocated space/capacity displayed on the home page?

Thank you, Naveen. Appreciate your answer.

In my case, the volumes were over-allocated/over-provisioned.

To add to your answer -

It is calculated as below:

Available Physical Space: 5TB

1 Disk Group (Virtual Pool): 4TB

2 Volumes of 3 TB each (total 6). Actual data on each volume 1.5 TB (total 3)

So the allocated is 3 TB, unallocated is 3 TB.

Virtual Pool: 4G. 

 The unallocated shows the virtual space/capacity also. It will be nice if the home page shows the actual unallocated space/capacity (1 TB) and virtual space/capacity (2G) to avoid confusions. 

 

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Re: MSA 2050 - What is unallocated space/capacity displayed on the home page?

@NathanM .....hope you got the idea of unallocated space

If anything not clear please share the screenshot of the SMU homepage and we will try to help you

I want to provide my inputs for the example that you have mentioned as below,

Available Physical Space: 5TB      >> this can be total physical raw space of the system means space of both Pool A & B

1 Disk Group (Virtual Pool): 4TB  >> this space belongs to single Virtual Pool either Pool A or Pool B

2 Volumes of 3 TB each (total 6). Actual data on each volume 1.5 TB (total 3) >> These are Thin provisioned volumes which means both volumes can go up to 6TB each 3TB volume but right actual allocation total 3TB for both volumes

So the allocated is 3 TB, unallocated is 3 TB. >> This is wrong because allocation happens from Pool space or specifically from VDG space and you shouldn't consider volume here. As it's not clear how much is total Pool space so it's difficult to say how much space will be unallocated from Pool space.

Virtual Pool: 4G. >> Is this Pool total size ? you means 4TB?

Now if I consider Pool size is 4TB and there are two volumes created out of it where 3TB pool space got allocated till now. Then 1TB will be actual unallocated space left in this Pool.

 

 

Hope this helps!
Regards
Subhajit

I am an HPE employee

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