Hi,   I don't think having the latest firmware would help the drive to be registered as the corrected size as written. It's the hardware limitation and also here are many factors that contribute to this discrepancy. You can refer to this page [URL]   Have you tried on another server to check the size?
Hi there, I recently purchased a Western Digital 18TB SAS drive (WUH721818AL5204) and it registers only 16.370 TB of the 18TB on my PowerEdge R340 Server with PERC 730p.  Has anyone had success in making PE R340 read their 18TB drive correctly?  Is there a firmware update to the controller that might do the trick? My firmware for PERC730P is 4.300.00-8366 and package version is 25.5.8.0001 Thank you! -sul
PE R340 not seeing entire 18TB Hard disk with PERC 730p