Software RAID controller (S140) inventory is not supported through iDRAC storage pages. Only Hardware RAID controller (E.g. H740, 340 etc.) are supported through iDRAC Storage pages. 
Salutations,I have a PowerEdge T140 with PERC S140 radio controller.From IDRAC in the Storage section I get this error: RAC0501: There are no physical disks to be displayed.1. Make sure that the supported physical drives are inserted into the enclosure or attached to the backplane.2. Make sure that the latest iDRAC firmware is installed.3. Reset iDRAC to its initial state. To reset, click Maintenance > Diagnostics > Reset iDRAC to Factory Defaults. Else, run the RACADM command at the Command Line Interface (CLI): racadm racresetcfg.4. Restart the server. To restart, click Configuration > Power Management > Power Control > Power Cycle System (cold boot). Else, run the RACADM command at the Command Line Interface (CLI): racadm serveraction powercycle.5. Make sure that the host server is powered on. Is there no possibility to view the controller / raid status from the web?
RAC0501: There are no physical disks to be displayed.