Cool! Next time I mess with bulk copies (probably when I start experimenting with mp3tool variations), I will do some testing there as well. As to the number of files, approximately 15,000 per drive, assuming fid files and mp3 files evenly distributed.

The command I used was "cp -v /driveA/fids/X* /driveB/fids" where A & B are drive numbers (specific for direction of copy) and X is the first digit of the fids. I needed to write a batch and break down the copy because of a cp error (too many files at one time).

The odd thing is that it only happened on the Mark2A, not the Mark2. I would suspect, given identical kernels, that it would fail first on the Mark2 with less physical memory. Unless there was something specific about the source hard drive that the files were being copied from that was the issue.