XFS would be perfect if there was a way to disable delayed allocation. Has that changed recently? I still use it on a number of machines because it tends to work better with large volumes. But that hasn't kept me from losing data with it, repeatedly. Of course I've lost data with lots of other linux file systems too, so in that regard it isn't much worse. These days if I really think the data is important I still use a bunch of little ext3 partitions with data=journal, barrier=1 and all the disk caches set to write through mode.

https://en.wikipedia.org/wiki/Allocate-on-flush