Recently I set up a Dell R720 to be a file server. 2 of the 16 drives were used for the OS (RAID 1) while the other 14 were used for RAID 10, or so I thought. I opened up OpenManage today and saw that there are 6 spans of drives but in one of those spans, there is only 1 drive. Looking deeper, I see that there is one drive not part of the RAID that is just in a "ready" state.
I swear that I didn't set it up like this but here we are. Is it possible to add this one drive to the RAID or am I going to need to blow away the whole thing and start over.
Side question, is it even possible to have a RAID 10 with an odd number of drives?
I figured it out. I booted into the RAID BIOS and saw that the drive in question (drive 12) was showing as foreign. After re-seating the drive it started rebuild in the correct span. Not sure what happened but its fixed