In migrating all my stuff from an old Mac Pro to the new one (late 2013), I moved my iTunes library (all 1.5TB of it) plus Aperture library to a relatively new Seagate 3TB GoFlex drive, which I had erased and formatted using the new computer before the big migration. Been having some odd issues with it this week - during a Time Machine backup of the drive it kept 'dropping off' and I'd get a "drive improperly ejected' warning (this is something that hadn't happened until I paired it with a Time Machine). I figured it might be due to it being plugged into a USB hub instead of directly into the computer so I changed that and it backed up fine. But since I was getting some odd "Can not save ITunes Library" messages since then, I figured I better run Disk Utility to see if something got corrupted and it wouldn't fix it. Disk Warrior fixed whatever errors and problems, and running Disk Utilities on it again it came through with no problems... ...until I clicked on the name of the drive itself, not on Volume within it. then I get a huge warning in red saying "Partition map check failed because no slices were found" Searches on what this means and possible fixes have been slim (and basically boil down to "back up the data and repartition it" as it seems to be usually associated with a wonky partition if one has multiple partitions on the drive. As I don't...not sure what it means) Is there a problem with the drive itself and I should toss it? Or do I need to re-format it and re-transfer over the library?