[KeeterJ]

This is an old problem I have had in prior releases of BTV, although 4.9.x seemed better about it: Too many new files to add to the library sends it into a tailspin. It does not matter if they were previously known, then a drive or folder taken off-line then again brought back on-line. It still takes a long time [forever?] for the background service to examine each file and re-register it.

I always store my recorded programs in various folders below the top-level recording folder. When I bring drives/folders on-line, I sometimes find that I have to add the files in smaller batches. I move the folders to a place on the disk that is not monitored by BTV, then I start dragging them back one folder at a time, waiting a minute between batches. It always seems to work.

As a side note, I currently have 14 eSATA 1TB drives but only two recording folders. I use the Windows junction or mountvol command to mount the drives as sub-folders below the #2 recording folder. BTV sees them just fine as one giant folder, but using this approach has allowed me to easily mount/unmount drives as needed and I have not seen the problem you are experiencing. But I'm talking about 4.9.1, not beta.