Barrapunto

No es así:

"This feature is able to speed up data writes, as it allows the faster SSD to first cache data and then, in a quiet moment, transfer it to the slower hard drive. The cache target is also able to store frequently read data from the hard drive on the SSD in order to speed up access to it."

http://www.h-online.com/open/features/What-s-new-i n-Linux-3-9-1845705.html [h-online.com]