RAID level 10 is a combination of RAID 1 and  RAID 0, think of it more like RAID 1 + 0, combining mirroring with striping. Similar to RAID 6, this version of RAID requires a minimum of 4 disk drives. However, the operates very different than RAID 6.

RAID 10 provides security by mirroring all the striped data and increased read operations by pulling striped data from either mirror set. The first two disks are a striped set of drives. That striped set is then mirrored to the remaining two disks to provide redundancy.

Advantages

If a disk fails in a RAID 10 configuration, the rebuild time is very fast compared to RAID 6 since all that is needed is copying all the data from a mirrored drive.

Disadvantages

Half of the storage capacity goes to mirroring, when compared to RAID 6 arrays, there is less storage capacity using the same amount of disks. Also, if the two disks that are both mirrored fail, the array fails. Two disks can fail with the array still being rebuilt but one of the failed drives must be a mirrored drive and the other a striped drive.

Other considerations

RAID 10 is considered a hybrid RAID configuration. There are several hybrid configurations that combine multiple RAID types such as RAID 50 and RAID 60, which take advantage of multiple RAID technologies.