Ron Blizzard wrote: > At any rate, I'm now unmounting and then waiting for a while before > removing the flash (just in case it is still writing). Thanks. You can if you want also run the 'sync' command to flush out the write cache of the system. I do that myself before I remove any type of disk that I have written to, mainly out of habit, it's not a bad habit to have. I believe once a file system is unmounted all of the writes have been flushed to it. You can see the change in behavior: - write a bunch of data to a disk, run sync, then unmount, it should unmount immediately - write a bunch of data to a disk, then unmount, it may take a few seconds(or more) to unmount. Not sure why those popups aren't showing up on a consistent basis, I don't use CentOS as a desktop, my Debian desktops don't show any messages I don't think, though Ubuntu seems to. nate