Thanks, will do. The drives are back in the case and I can't see the tops of them while they're in the chassis. However...I took a couple of photos of the drives, so I'll get that info and add it to my post above. Another question I have about the dataset. Would it be useful to see the OS the drive is running in (Windows (with specific version info), Linux (with specific kernel info), FreeBSD (with specific release info))? The reason I ask is because I know, for example, FreeBSD doesn't support NCQ and perhaps that (or some other ATA command that one or the other OS doesn't support or has a buggy driver) is contributing to the wedging of the drive?