Hello. Is the drive Dell certified? Try to install the latest OpenManage Server Administrator and check again: [URL] 
Good afternoon: Purchased some spare drives for our fleet of T710's, and today I was going to install a hot spare in one of the servers that currently has quantity 2 of 300GB RAID 1 (mirror).   Installed drive, lights blink a bit, right hand goes solid green, good to go (or so I think).  I go into OMSA and under connector 1 I only see the two physical disks.  Going into virtual disks does nothing as there is no hot spare to assign. However, if I pull a controller log I do see that it sees the drive and sets it to unconfigured_good: 05/18/17 10:24:47: PD   Flags    State Type Size     S N Vendor   Product          Rev  P C ID SAS Addr         Port Phy DevH BFw  BRev 05/18/17 10:24:47: 2    f1400005 00020 00   22ecb25b 0 0 0 SEAGATE  ST3300657SS      ES68 0 0 02 5000c50039816c0d 02   05  0c    NA   NA (cut) 05/18/17 10:32:23: EVT#02497-05/18/17 10:32:23: 114=State change on PD 02(e0x20/s2) from UNCONFIGURED_BAD(1) to UNCONFIGURED_GOOD(0) Why does this not appear in OMSA?  I have tried multiple slots and multiple drives.  The controller (via log pull) recognizes them all, but they do not show up in Physical disks.  I can attach the full log if needed. Windows 2008 R2 H700: Firmware Version 12.10.3-0001 Driver Version 4.31.01.64 Storport Driver Version 6.1.7601.21686 OMSA verison: 7.0.0
T710 w/PERC H700 Integrated controller sees drive, OMSA does not