This question has got a bunch of us talking in chat, and it had me wondering:
Most of RAID 5's ugly characteristics like UREs and long rebuilds present themselves in much larger arrays. With a RAID 5, you'll have 66% disk space available and can sustain 1 disk failure. With a RAID 1E, you'll have 50% disk space available and can also sustain 1 disk failure.
Given a three disk array, in what case would it be preferable to use a RAID 1E over a RAID 5?