I plug in a Seagate GoFlex 500GB external hard drive into my PowerBook (specs at bottom of post). I go into Disk Utility to try to resize one of my partitions so I can back my Mac up. I click the final "Continue" button, and a few seconds later I get an error saying that the partition was not completed correctly and that the drive was removed. It was not. It shut itself off briefly (less than a second because I saw the light (normally always on) go out and come back on)!
I disconnect my hard drive and plug it into a PC. I pull up Disk Management (Windows equivalent of DU) and I try to resize the volume. Not possible. Okay. But they both are read and I could open each one's folder. So I plug it into my Mac again and after several seconds of it not showing up, I hold it to my ear. First, it spins up. It clicks the whole time. Next, it gradually spins down while making four whines/beeps (inaudible unless you are holding the unit up to your ear), each seperated by 3/4 of a second. Then it spins up again and repeats. I now plug in another 640GB unit and it clicks rapidly (inaudible unless held to ear). Both drives are then plugged into the PC. In Disk Management they show up. I format one of the volumes on the 500GB drive (I realized I did not need the data) and I removed the volume's drive letter. But the drives do not show up on my Mac anymore. (The 500GB model used to!!!!!)
One drive had a USB 3.0 adapter. One had a 2.0 adapter. I swap around the adapters and I achieve the same result. BTW, I also have a keyboard in the other USB port. It was there from the start.
The 500GB drive is NOT corrupted. In fact, I used to use it for Time Machine. My TM data is still on that drive and I dare not erase it. The drive is not powered by an AC adapter, either.
I don't want to go out and get another hard drive because I'm looking to sell my PB.
What went wrong? How come it no longer connects? I can't have killed the drive becuase it reads on a PC.