This has been asked a few times, so I ended up writing a blog entry on
it
http://marc.merlins.org/perso/btrfs/post_2014-04-26_Btrfs-Tips_-Cancel-A-Btrfs-Scrub-That-Is-Already-Stopped.html
and in the end pasted all of it in the main wiki
https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#btrfs_scrub_will_not_start_nor_cancel
Of course, this is really a stopgap until the cancel tool can realize
that the scrub isn't really running anymore, and update the state file
on its own.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/ | PGP 1024R/763BE901
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