The process named "convert" in WD My Cloud EX4 causes severe performance and availability problems as well as unnecessary wear of hard drives. After putting many files into the EX4 unit, the convert process begins to consume CPU 100% and cause many unnecessary I/O activities on the hard drives until the owner reboots the unit.
(Update: Firmware 1.02.36 cut CPU consumption down to 40%.)
These severe symptoms have been experienced by many in the community:
Like many others, I expect EX4 to be a 24x7 reliable storage system with good consistent performance. I do not need media streaming and cloud capabilities. I do not want to waste system resources to have my files analyzed to be classified whether they are videos or photos. I'd be more than happy if EX4 reported 100% of my files classified as "Other" without looking at any of them.
Jumpman has made a good point on wdmcserver and thumbnail generation. If you agree, please also vote at http://community.wd.com/t5/Personal-Cloud-Ideas/Please-don-t-create-WDMC-TWONKY-folders/idi-p/693840
I would like WD to provide the owners of My Cloud EX4/EX2 with the Dashboard options to disable the "convert," "wdmcserver," "wdphotodbmerger," and other processes that generate metadata, thumbnails, and hidden folders so that they will never run again on a future firmware update.