[chaostheo]

That's true, only mkfs.xfs & mount is required, any tuning options are optional. Write to filesystem while cut host power, last written data is incomplete but filesystem is coming up. With zfs you will get good chance for loosing import pool and all created datasets and even all snapshots at once in that case, so send/receive server should have other power, usv is good for clean shutdown and even backup always good to know :-)