RAID 10, also known as RAID 1+0, is the combination of RAID 1 and RAID 0 in a single system. So, it is a stripe of mirrors.
RAID 10 requires at least 4 drives to implement.
Characteristics & Advantages
High Read and Write rates achieved by striping RAID 1 mirrored segments
RAID 10 has the same fault tolerance and overhead as RAID level 1, due to mirroring.
During disk failure, the rebuild time is very fast since all needed is copying all the data from the surviving mirror to a new drive.
Under certain circumstances, RAID 10 array can sustain multiple simultaneous drive failures
Disadvantages
As half of the storage capacity goes to mirroring, RAID 10 is a very expensive way to achieve redundancy