UNMAP ESXi5.1 Compellent FC Array

Guys,

I am new to Compellent and I am in a new role hat uses it exclusively 

SC8000

v6.4.5 

We use a lot of RDMs here but  would it be worth running these commands against our VMFS datastores and is it still needed with version 6.4.5?

Issue UNMAP command against VMFS datastore (manually)

The actual space reclamation command is as follows. This writes a “balloon file” to the top blocks of the datastore to persuade the SAN into relinquishing free space

• Log into the console with SSH (putty)
• Change directories into the VMFS datastore you wish to reclaim space from
• cd vmfs/volumes/datastorename (where datastorename is the actual name of the datastore)
• Issue the UNMAP command
• vmkfstools -y 60 (where 60 is the percentage of space the balloon file will attempt to reclaim space from)

I there is space tied up i would like to free it up, devs create and delete VMs on the regular and I am not sure if this is being done yet and I would like to propose doing it?

There is no chance of corrupting data on the datastore?