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February 2nd, 2015 00:00

Need symcli steps for thin storage relcamation in VMAX

Hi,

I need the symcli steps for reclamaton of thin devices reclamation in vmax,

Aslo please know whether the thin pool rebalancing will automatically take place once I unbind the TDEV from the pools or if it is a manual prcoess whn should i need to execute the pool rebalance command.

Thanks

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122 Posts

February 2nd, 2015 04:00

Below Steps for Storage Reclamation from Vmax.

Step 1: Verify the Masking View Information. The Masking would give us the information about the

current Storage Group(SG), Initiator Group(IG) and Port Group(PG)

# Symaccess -sid XXX list view

The above syntax will list all the Masking View and identify the one you are working it on.

Step 2: View the Details of the Specific Masking

# Symaccess –sid XXX show view XXXXXXXX_MV

Step 3: Unmask and unmap the Devices. With Autoprovisioing Groups, this is simply matter of deleting the Masking View and the Devices will be unmapped and unmasked automatically. The following is an example if the command.

Caution

#symaccess –sid XXX delete view d1oraclust_MV

Step 4: Delete the Storage Group

#symaccess –sid XXX delete –name XXXXXXXX_SG -type storage -force

Step5 Delete the Initiator Group

#symaccess –sid XXX delete –name XXXXXXXX_IG -type initiator -force

Step6: Delete the Port Group

#symaccess –sid xxx delete –name XXXXXXXX_PG -type port -force

Step 7: Unbind the Devices from the thin Pool.

This step will make sure that we unbind the devices those are reclaimed from the host.

#symconfigure –f unbinddevice.cmd –preview

#symconfigure –f unbinddevice.cmd –prepare

#symconfigure –f unbinddevice.cmd –commit

Step8: Dissolve the Meta Devices

It is advised and to follow to delete the met devices once these freed up. The Intention behind is to have no discrepancy in the data of one server to be presented to other host by reusing the Devices in any form.

# symconfigure –f metadissolve.cmd preview

# symconfigure –f metadissolve.cmd prepare

# symconfigure –f metadissolve.cmd commit

http://www.emc.com/collateral/software/white-papers/h6730-virtual-provisioning-space-reclamation-wp.pdf

19 Posts

February 2nd, 2015 21:00

Hi Ugin,

Thanks for the info

I question here, once the meta devices were dissolved does the thin pool rebalancing automatically takes lace or should i need to trigger manually ?

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122 Posts

February 2nd, 2015 22:00

I believe it should be done manually

121 Posts

February 3rd, 2015 04:00

There will be no automatic pool rebalance, however in most circumstances a rebalance is not necessary. The removed devices should have already been evenly spread between all the TDATs in the pool. Removing those old devices should should leave the pool in an essentially balanced state with no extra intervention required.

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