The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.2.9 dm-cache and dm-era

The UEK does not support the dm-cache and dm-era device mapper targets. (Bug ID 19611720)