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Sateesh_vCloud

How to know backend storage is Thick provisioned or Thin ?

I have 4 SSD LUNs of each 8 TB size and Storage team claims they are dedicated LUNs for my project

However when we tried to provision VM on one of the data store it fails with below error.

failed because of pyVmomi.VmomiSupport.vim.fault.NoDiskSpace.

Can we know weather the LUN presented is THIN or THICK before contacting storage team?

------------------------------------------------------------------------- Follow me @ www.vmwareguruz.com Please consider marking this answer "correct" or "helpful" if you found it useful T. Sateesh VCIX-NV, VCAP 5-DCA/DCD,VCP 6-NV,VCP 5 DCV/Cloud/DT, ZCP IBM India Pvt. Ltd
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daphnissov
Immortal
Immortal

Not unless you have a VASA provider for this storage configured. Otherwise you'd have to get this information directly from the storage.

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Finikiez
Champion
Champion

For sure it's only possible if you can manage your storage from web client with VASA as mentioned eralier.

Also you can check vmkernel.log on host where you try to power on VMs. There should be some SCSI sence codes from storage array which should tell you that array report end of space on LUN.

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SureshKumarMuth
Commander
Commander

Sateesh_vCloud

As said above, you have to check either via VASA plugin or from SAN team, in case if the error occurred because of less free space in thin lun, you should see appropriate SCSI sense codes in vmkernel log of the server

Usually you can see in log something like "failed H:0x8 D:0x0 P:0x0 Possible sense data: 0xA 0xB 0xC"

In the above sense code

0xC is the plugin code which will give you information on the thin provisioned lun

following are the relevant code

06h  Allocating more thin provision space. Device server is in the process of allocating more space in the backing pool for a thin provisioned LUN.

07h  Thin provisioning soft-limit exceeded.

08h  Backing pool for thin provisioned LUN is out of space.

Regards,
Suresh
https://vconnectit.wordpress.com/
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Sateesh_vCloud

Thanks for all the responses and I manage to find some additional details for this question.

Identify Thin-Provisioned Storage Devices

------------------------------------------------------------------------- Follow me @ www.vmwareguruz.com Please consider marking this answer "correct" or "helpful" if you found it useful T. Sateesh VCIX-NV, VCAP 5-DCA/DCD,VCP 6-NV,VCP 5 DCV/Cloud/DT, ZCP IBM India Pvt. Ltd
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