disk ejected warning

That would be a diffcult process. It would involve cloning the volume to another disk, then cloning back.

There may be other considerations since TM is involved. I'd bring it back to the Apple Store who set it up for you.

Mind you, I'm not sure it's related to the disk ejected message....

Oh, well OK if you were willing to erase it, that makes it easy 😉

I have a similar situation. I'm running a Late 2011 Mac mini with Lion 10.7.3, and a Western Digital My Book Essential 2GB, and I made the mistake of trying to use it with both the mini and a Late 2006 Macbook White with Lion 10.7.3. It backed up successfully for about three weeks, and is now consistently displaying the ridiculous error message, despite being formatted the exact same as the drives it's (trying to) backup: Mac OS X Extended (Journaled).

I have also verified that the error still occurs regardless of whether the Energy Saver option to "Put the hard disk(s) to sleep when possible" is selected or not.

Apple and Western Digital need to admit that this drive is simply not compatible, at least in USB. I've heard that the mini doesn't provide sufficient power to its USB ports to run this and other drives (even though the My Book has external AC). Does anyone have any suggestions as to what to do to fix this? Am I just going to have to buy two other drives (one for each computer), and if so, what drives are the best way to go?

I have the same problem on my iMac 27" and my Iomega 2Tb external hard drive that I use as my main "time machine".

I also have a problem of my camera's memory card being rejected so that I cannot upload to Aperture.

This has started since updating to Lion, but did not happen immediately after the change.

I used a Western Digital 2Tb network storage disc for a while, but this prevented my Windows laptop and Aperture from shutting down when used for PC back up or as an Aperture vault. I no longer use the WD, but rely on directly connected USB hard drives.

Did anyone ever find a solution that solved your problem so that I can try it too?

I have an external 500 GB iOmega eGO with firewire/USB 2.0 connection. I've had it for a few years now and never had any issue with it until it recently started to give me this error message.

It made me think the drive was dead, as I had moved my MBP and accidentally disconnected the drive a couple of times. I even got a message warning me to back up my data and re format the device as it would not save any data to it.

I finally re formatted it but the disk eject warning message continued.

At the end I tried using the USB cable instead of the firewire one, and voila! no problems ever since.

Hope this helps someone out there...