MSA 2060 SAS Space discrepancy issue

[Florant]

Hello Everyone, 

I would like to have your opinion on the below space issue:

I have  1 Volume presented to  Esxi ( 2 hosts esxi 7.0.2)  as a datastore volume vmfs6. From MSA i see a lot of unsed spare (1.6TB) as below
A VMware Datastore 4999.9GB 3394.5GB base OK
Meanwhile from vSphere datastore there is only 200Gb free. Apart from the show volume size in base 2/base 10 format still the difference is not correct.  MSA volume are thin provisioned and VMs disk also thin.

More info can be provided.

Thanks  in advance.

Regards,

Florant

[support_s]

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[sbhat09]

Hello @Florant,

Can you please provide more details? I couldn't quite understand the problem. It will be great if you provide below details:

What is the number of disks*capacity on your MSA?
What is the usable space?
What is the used space?
What is the free space?
What is the number of spare drives?

What is the size of the datastore volume?
What is used space? what is free space?
What is the size of volumes presented to each VMs? Used space? free space?

In your observation, what is the difference/issue?

Regards,
Srinivas Bhat

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Note: All of my comments are my own and are not any official representation of the company.

[Florant]

Hello Srinivas , 

Below some info:

There are 8 SSD drive x 1.92Tb capacity RAID 6. NO Spare disk.

# show disk-groups
Name Size Free Pool Tier % of Pool Own RAID Disks Chk Status Current Job Job% Sec Fmt Health
--------------------------------------------------------------------------------------------------------------------
dgA01 11.4TB 1949.0GB A Performance 100 A RAID6 8 64k FTOL 512e OK
-------------------------------------------------------------------------------------------------------------
# show pools
Name Serial Number Blocksize Total Size Avail Snap Size OverCommit Disk Groups Volumes Low Thresh Mid Thresh High Thresh Sec Fmt Health
---------------------------------------------------------------------------------------------------------------
A xxxxxxxxxxxxx  512 11.4TB 1948.9GB 0B Enabled 1 4 50.00 % 75.00 % 98.13 % 512e OK
---------------------------------------------------------------------------------------------------------------
# show volumes
Pool Name Total Size Alloc Size Type Health Reason Action
-------------------------------------------------------------------------------
A HV Cluster Shared Volume 6486.7GB 6145.6GB base OK
A HV Quorum 998.2MB 41.9MB base OK
A VMware Cluster Witness 4999.6MB 1153.4MB base OK
A VMware Datastore 4999.9GB 3396.9GB base OK
-------------------------------------------------------------------------------
Success: Command completed successfully. (2022-05-27 09:49:10)
#

I have 2 Volume presented as datastore. One volume is used for Hyperv Cluster , and other one for VMware datastore.

From Vsphere point of view the capacity usage is as below:

• StorageFree: 192.6 GBUsed: 4.36 TBCapacity: 4.55 TB

Provisioned Space Used Space
1.92 TB             1.28 TB
1.07 TB          884.15 GB
832.08 GB     832.08 GB
710.08 GB     360.88 GB
594.74 GB      61.99 GB
582.06 GB    36.74 GB
570.08 GB    46.18 GB
570.08 GB    32.38 GB
570.08 GB   34.42 GB
570.08 GB    31.85 GB
570.08 GB    30.54 GB
570.08 GB    36.04 GB
554.08 GB    6.81 GB
520.09 GB    106.82 GB
518.08 GB     113.9 GB
404.62 GB    55.34 GB
358.09 GB    101.25 GB
232.08 GB    77.46 GB
182.08 GB    43.64 GB
166.22 GB    137.28 GB
66.08 GB     25.06 GB
44.08 GB     28.03 GB
24.08 GB    8.69 GB
24.08 GB     8.87 GB
24.08 GB    10.92 GB
24.08 GB    9.09 GB
2.2 GB       1.15 GB
2.2 GB     1.07 GB
2.2 GB    1.07 GB

This output is from vsphere , provisioned and used space of each vm in this datastore. Althought there is an issue here , as if i check the used space on OS level insdide VM i see the real used space is much less than showing from this output.

So from my observation the free space showing in MSA Volume is not the same as in VMware datastore level , seems like the oposite of unclaimed space from free block on Vmware.

And just for informare ,from the other side the Volume presented on Hyperv shows the free space correct comparing msa volume and Hyperv datastore.

Regards,

Florant

[SUBHAJIT KHANBARMAN_1]

@Florant Usually Storage level size shows in Base-10 and Host Operating System level size shows in Base-2. So I would suggest you to change the base size at MSA end and then check size again at the Host end.

Please refer Storage Management guide and CLI guide to get the procedure.

Hope this helps!
Regards
Subhajit

I am an HPE employee

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[Florant]

Hello Subhajit, 

Yes you are right , i already thought abot that bu still the difference is too big.

After cahnged base size setting on MSA side , and set to base 2 :

A VMware Datastore 4656.6GiB 3164.7GiB base OK 

It is almos 600Gb free on msa Volumes .

BR,
Florant

[SUBHAJIT KHANBARMAN_1]

@Florant ..It's possible that you haven't started space reclaim at Host end. Please go through below articles where similar information I have shared,

https://community.hpe.com/t5/MSA-Storage/MSA-2050-Virtual-Pool-B-degraded-as-it-ran-out-of-space-How-to/m-p/7053678#M12985

https://community.hpe.com/t5/MSA-Storage/VMware-provisioning-type-for-MSA2040-with-virtual-pool/m-p/6987722#M11437

https://community.hpe.com/t5/MSA-Storage/Storage-remains-full/m-p/7024719#M12320

https://community.hpe.com/t5/MSA-Storage/MSA-2052-diskgroup-and-vmware/m-p/7009675#M11913

Hope this helps!
Regards
Subhajit

I am an HPE employee

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