I have had multiple cases of data loss on WD drives since upgrading to Mavericks, and I do not use any WD software. I was using a 4-bay PROBOX USB3 enclosure with 4 independant drives, each with 1 volume, no RAID.
I have managed to copy large files off the WD drive onto my MBP internal drive using the finder, and then find that they are not identical. This problem is intermittent, does not generate any Finder errors, and the drives all show 100% health via SMART.
The configuration was rock-solid before Mavericks, and has trashed the directories of 4 drives since I upgraded last week.
I am attempting to find a solid replication case for this, but it is difficult. I have not been able to replicate the issue on another 2-bay USB2 dock that I have (different manufacturer).
One thing is clear: only one thing changed – I upgraded to Mavericks.
