This is another quick note for me as its not something i need to do alot.
After migrating a VM to another datastore i noticed our Nimble was showing less free space than VMware – from the past i remember running a command to rectify this but obviously forgot it hence me making a note now.
for ESXi 5.0
SSH to your VM host
# cd /vmfs/volumes/<volume you want to reclaim space from>
# vmkfstools –y <% of the space to reclaim>
for ESXi 5.5 and 6.0
# esxcli storage vmfs unmap -l <Volume>
I had an issue on one of my luns with “Cannot find the VMFS volume with label”
So as a quick work around i used the following command and just used the volume uuid –
# esxcli storage vmfs unmap --volume-uuid=volume_uuid