2 Foreign disks in Raid array

hi

we had a disk fail in our Raid 5 setup on our old PowerEdge 2950 now we have re-seated the failed disk and it rebuilt ok but in the raid controller screen I can see 2 foreign disks but no hot spares

its perc 5/E with 14 SAS disk with 2 virtual disk groups

to make matters worse this is my first week in the job so don't know the history of the server or storage

what's the best course of action

also out of warranty so time to be careful