Risc of data-loss if manually enable non-buffered I/O?

[AKA-Mythos]

Copying using Non-buffered I/O is now disabled by default due to compatibility issues with certain devices. This will affect system cache memory usage while copying and may also affect copy speed (although it can be both better or worse, depending on your system, and probably won't make a huge difference to speed either way). If you wish to go back to how things were in the previous release, simply go to Preferences / Miscellaneous / Advanced and set copy_nonbufferio_threshold to 1 MB.

I'm interested if there is any risc of data-loss if we enable the non-buffered I/O feature again?

Since our machines are really lagging now for large file transfers it would be nice if we can enable this feature again. But certainly we won't do that if we may loose some data under rare conditions.

[Leo]

You should be fine. Some devices have a problem with it, which results in error messages or slow performance. If you didn't see error messages or slow performance before, you can turn it back on.

We just turned it off by default as it was causing error messages on some setups, which made having it on by default cause more problems than it solved.