Because my notebook has a SSD and a HDD, I want use the SSD as cache just like Rapid Storage in windows. I find bcache offers this functionality so I decide to try it.
I got bcache and bcache-tools via git then followed the guide at:
http://evilpiepirate.org/git/linux-bcache.git/tree/Documentation/bcache.txt
Getting started:
You'll need make-bcache from the bcache-tools repository. Both the cache device
and backing device must be formatted before use.
make-bcache -B /dev/sdb
make-bcache -C -w2k -b1M -j64 /dev/sdc
Does that mean I have to format the whole HDD to enable the bcache?