Problems with UMD Drive RIPS?

Some folk have reported problems with UMD Drive rips. Here are some common problems

1. Works fine from Memory stick but no files seen when UMD (or UMD Drive under 3.9x) is selected. To fix this try: Cold booting the PSP with the disk in the drive (turn off or select restart from the SELECT menu), Use SELECT Menu and select UMD / or UMD Drive,Exit the SELECT Menu and connect via USB
2. Problems with UMD Disk ripping being slow: The disk might be dirty, clean it with care using radial strokes, gently.