Hi Yannara,
Think you posted something similar just there 
Just seen this one - notice you are using DAS storage - in my instance we have fibre in our branch offices which is supported - unfortunately DAS isn't 
See:
"
Storage I/O Control has several requirements and limitations.
#■ | ##Datastores that are Storage I/O Control-enabled must be managed by a single #vCenter Server system. |
■ | ##Storage I/O Control is supported on Fibre Channel-connected, iSCSI-connected, and NFS-connected storage. Raw Device Mapping (RDM) is not supported. |
■ | ##Storage I/O Control does not support datastores with multiple extents. |
■ | ##Before using Storage I/O Control on datastores that are backed by arrays with automated storage tiering capabilities, check the #VMware Storage/SAN Compatibility Guide to verify whether your automated tiered storage array has been certified to be compatible with Storage I/O Control. #Automated storage tiering is the ability of an array (or group of arrays) to migrate LUNs/volumes or parts of LUNs/volumes to different types of storage media (SSD, FC, SAS, SATA) based on user-set policies and current I/O patterns. No special certification is required for arrays that do not have these automatic migration/tiering features, including those that provide the ability to manually migrate data between different types of storage media. |
Hope this helps!