Hello,   To begin, does the drive at least have a single solid green LED lit? It's not uncommon for someone to mistakenly mount the drive in the carrier incorrectly, which causes the drive to not seat with the backplane properly. You want to make sure that the drive is mounted such that the back of the drive is flush with the back end of the carrier.   Second, what is the drive itself? Does this happen to be a Dell branded drive? Non-Dell drives generally work, but not always. Some don't negotiate a connection. If it would be easier, you could share a picture of the drive label. That would provide relevant everything about the disk.   If none of that gives an answer, you can export the RAID controller log. It's a plain text file you can view in any text editor. You would just want to search the log to see what you can find about physical disk 0 or "PD0."   Exporting RAID log: [URL]
I have a PowerEdge R710 with 6 hard drives  I am using PERC 6/i and have 2 drives RAID 1 and 4 Drives RAID 5 Connector 0 Phy Disk 0.0.1   0.0.2   0.0.3 Connector 1Phy Disk 1.0.4   1.0.5 Virtual Disks WIN12R Status = Degraded  Phy Disks 0.0.1SQL14 has Phy Disks 0.0.2  0.0.3  1.0.4  1.0.5 I have used Integrated BIOS Configuration Utility as well as OpenManageI can't find anything that would point me to information I can use to fix the unrecognized disk 0 I am new to this Server stuff so I am at a loss for where to go next (I think I wore out Google trying to fix this) Any help is greatly appreciated  RIchard  
PowerEdge R710 swapped drive is not recognized