Quoted from wayout440:
It's a well known fact that linux based operating systems can get file structure damage if suddenly shutdown. I have an Ubuntu based MP3 jukebox that suffered from repeated shutdowns
What filesystem are you using?
Assuming ext4 with the default "data=ordered" option should not have any data integrity issues.
I would not recommend using XFS or "data=writeback" on anything being treated as an appliance. I'm stealing a comment from https://help.marklogic.com/knowledgebase/article/View/209/0/linux-filesystem-tuning---performance-datawriteback-vs-dataintegrity-dataordered (the original discussions appears to be unavailable)
Linus Torvalds comments on 'data=writeback'
"it makes things much smoother, since now the actual data is no longer in the critical path for any journal writes, but anybody who thinks that's a solution is just incompetent. We might as well go back to ext2 then. If your data gets written out long after the metadata hit the disk, you are going to hit all kinds of bad issues if the machine ever goes down."