I’m pleased that you have finally got somewhere with your device.
Thanks for your advice to raise a support case. Unfortunately, that’s exactly what I’m about to do! Mine has been working fine up till now (on the latest firmware) but I have been try to back up large amounts of data using the USB port, thinking it would be quicker than the network. Across the network (Gigabit) I get 6.7 MB/s, copying about 7,500 files totalling 10GB in about 14min 30 seconds. Connected via the USB 3.0 port on the MyCloud I almost get USB 1.1 performance, taking 22 minutes at a rate of 7.9MB.s to copy the same data. Slower than the network! My PC copies the same data at 52.8MB/s in 3 minutes 9 seconds from the same external USB disk that was used on the MyCloud.
Sometimes now, while copying, it will simply stop, continuing after a minute or two later without reporting any errors. Also it slows to a crawl, amd then fails to copy every file stating “Permission denied,” asking me to cancel, retry or skip. Retrying eventually returns to offer me the same options and results in a directory full of files which are all 0 bytes in size. Not an ideal backup solution.
For what it’s worth I waited until scanning had completed, turned off DNLA and turned off the scanning in the Twonky web interface. Sadly, the WD software overrides this and it scans immediately it is written to - even just one non-media file written to an area which is not included in the scan! Crazy.
Logging in to the UI is now slow. It takes about about a minute for the login page to show and another 30 seconds to process my uid and password.
There are no related errors in the dmesg log or in /var/log/messages. This all happened when I was copying and it looks like the database crashed, and I got this:
I left it overnight to rebuild but it hasn’t been the same since.