Please use the subforum search feature, magnifying glass icon upper right, as there are numerous prior discussions on My Cloud sleep (or its inability to sleep), how to check how long (or little) the My Cloud is sleeping using a script via SSH, and various things/code to try and help the My Cloud sleep more.
Here are several past discussions to get you started, use the forum search to find many others:
http://community.wd.com/t/new-sleep-awk/153431
http://community.wd.com/t/sleep-awk-script/145039
http://community.wd.com/t/sleep-time/95608
And we are currently discussing the latest v4.x firmware’s inability to sleep in another thread. Please see the many prior sleep threads before jumping into the following thread to ask questions about sleep and the latest v4.x firmware:
http://community.wd.com/t/firmware-4-05-00-315-discussion/202234
