On Thu, Oct 02, 2025 at 02:44:47PM +0000, H. Hartzer wrote: > the default is 'nosync', not 'async'.
The sync and async options are independent. The default is nosync AND noasync. You can set sync and async simultaneously. One does not remove the other. The defaults work well in the most common situations. > I am not sure how HDDs handle power > loss Decent mechanical drives can make use of the inertia of the spinning platters to write data that is in volitile memory to the media. > There may be another way to test this that's safer, other than cutting > power. I have had crashes also cause this type of corruption. > > Perhaps something like halt -n might work? Or just use a normal filesystem on a normal drive without RAID. I see nothing in your setup that would benefit from the complexities you are creating. Simple solutions such as storing highly variable data on it's on dedicated partition can probably do more to reduce downtime due to unexpected events than worrying about how a particular drive will behave.
