Run these commands to collect disk and LUN information from ESXi 6:
- Run the esxcli storage core path list command to generate a list of all LUN paths currently connected to the ESXi host.
- Run the esxcli storage core device list command to generate a list of LUNs currently connected to the ESXi host.
- Run the esxcli storage vmfs extent list command to generate a list of extents for each volume and mapping from device name to UUID.
- Run the esxcli storage filesystem list command to generate a compact list of the LUNs currently connected to the ESXi host, including VMFS version.
- Run the ls -alh /vmfs/devices/disks command to list the possible targets for certain storage operations.
http://pubs.vmware.com/vsphere-60/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-601-storage-guide.pdf
http://pubs.vmware.com/vsphere-60/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-602-host-management-guide.pdf