How to run VAAI UNMAP and return capacity to Element

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Category:: element-software

Specialty:: hci

Last Updated:

Applies to

Element Software:

All versions

ESX:

ESXi 5.5
ESXI 6.0
ESXi 6.5

VMFS:

VMFS 5
(ESXi 6.5 with VMFS 6 runs this automatically, unmap is not available)

(Optional) Element Plugin for vCenter (VCP):

VCP 4.3
VCP 4.2.3
VCP 4.1
VCP 4.0

Description

UNMAP is an ESXi primitive that allows the ESXi host to inform the storage array that files or VMs have been moved or deleted from a Thin-Provisioned VMFS datastore. This allows Element to correctly release unused blockspace and reclaim capacity.

UNMAP is beneficial to use when vCenter is reporting less used data than Element is using.