Set up a server in the home, what do you want to be on the ESXI 5.1 RDM,
Run the following command
Vmkfstools - z/VMFS/devices/disks/t10 ATA_____WDC_WD10EVDS2D63U8B0__________________________WD2DWCAV57930170/VMFS volumes/system/Gnoboot Synology/RDM VMDK
Tip: Extra arguments at the end of the command line
Don't know what went wrong