sentences:  Usable capacity of a RAID 1E array is 50% of the total capacity of all drives forming the array; if drives of different sizes are used, only the portions equal to the size of smallest member are utilized on each drive.One of the benefits of RAID 1E over usual RAID 1 mirrored pairs is that the performance of random read operations remains above the performance of a single drive even in a degraded array.The ZFS filesystem provides "RAID-Z", a data/parity distribution scheme similar to RAID 5, but using dynamic stripe width