I have a 1tb and 2tb caviar black hard drives installed in my mac pro that are a few years old. I test them in disk utility and they come out fine but when I go browse the drives it takes awhile before the files show up. The drives aren't even close to being full. Sometimes I have to close finder and keep reopening it a few times and then I can see the files. Are my drives dying? I was planning on replacing them with 3tb seagates anyways.