I recently obtained a new 4TB MyCloud and attached to it a WD “MyBook” 3TB drive (USB 3.0 capable) for a total of 7 TB of storage. The MyCloud software allowed me to create a share for the attached USB drive.
Using WD SmartWare backup, I initiated a backup to my system (400,000 + files, over 6 TB of data storage). I noticed that
a) writing to the USB attached drive was slow (make the very slow)
b) WD Smartware reported about 24 hours later (the backup was not yet complete) that neither the attached USB drive nor the internal 4 TB drive (on the MyCloud) was available to my network.
I had to reboot the MyCloud and lo and behold, the network volumes were available again. Logging into the MyCloud via SSH revealed a problem with the USB drivers (i.e., the LINUX O/S on the MyCloud, not the Windows box I am backing up).
I have subsequently tested and validated my 3 TB USB 3.0 drive; it is fine. The problem is in the MyCloud. This anomaly was repeated several times. I exchanged the MyCloud 4 TB device thinking the problem was a defective device but the same problem, with almost the same timing, reappeared.
Yes, I was using the new firmware.
Can someone from WD respond? This does seem to be a scenario where the internal SMB server is being overloaded leading to network faults.