I need to upgrade some drive firmware and I'd like to shut down bcache for the duration.
The docs show how to stop a bcache device:
Write to this file to shut down the bcache device and close the backing device.
For me that will look like this:
echo 1 > /sys/block/bcache0/bcache/stop
and for the cache device:
echo 1 > /sys/fs/bcache/<set-uuid>/stop
But how do I bring the device back (without rebooting the server)?