Iomega External Harddrive not found

I have had a USB Iomega harddrive for six months. It has always worked without a problem until about a week ago when without warning, it stopped being recognised by the computer. I have never before had any problems with it.

I've tried plugging it in to three different computers, using both Windows and Ubuntu.

It doesn't appear in My Computer, but if I look in Device Manager, it shows up, although the only thing I am able to do is unistall the drivers. I tried unistalling and reinstalling them: a message appeared telling that a new device was found, it was installing the drivers, the drivers were installed, it was now available to use... However, it still doesn't show up in My Computer and no AutoPlay happens, so it appears that nothing has changed.

I don't understand, as the computer obviously sees something, but not enough...
What can I try?

It sounds like you need to allocate it under disk management.

For Ubuntu, you may have to manually mount it.

You should be able to right click on it and allocate it. You could also try a chkdisk.

Try booting to the command prompt in the recovery console. Use the 'fixmbr' command to rewrite the MBR. It may have become corrupt.

Um... I'm not really prone to posting on forums or anything--in fact I'm pretty much a big computer newb, or so I've been told--but I'm trying to solve a problem that is LITERALLY just like this one. Everything is pin-point similar to what's going on with my external harddrive....

Could someone help me, please? I managed to figure out everything up to "command prompt" and then it all mostly went to hell. If someone could talk me through it that would be great.

My supreme computer ineptitude I hope can be excused, but otherwise yes, I think I have. I went to the Disk Management and assigned it to another letter. It prompted me to format in order to properly access it, and from there I wasn't sure what to do. It would only let me view "Help" and "Properties" otherwise...

I am having the same exact problem with my 1 tb iomega external hard drive. It is recognized under device manager, I have uninstalled it and reinstalled it several times. A message will pop up saying that it is ready, but it won't show up anywhere for me to access it. Under disk management it shows up as disk 2, but is unallocated and doesn't show up as a tb. I have no option to allocate it. Also, me drive will go through a beep, pause, beep, pause, for several minutes when it is first turned on. I know very little about computers, but I have very important information on this drive, which is about three quarters of the way full. Let me know if you, or anyone else, knows how for me to get this working again without losing my info.
Thanks.

When i right click, the only options I get are "properties" and "help". Do you have any other ideas?

Ok, I don't know much about this stuff, but I will do my best. It is not being recognized with a letter. It says basic. It say Healthy (EISA Configuration). And it has a solid black line on it. My other external hard drive which is functioning properly says basic, Healthy (Primary Partition), and has a solid blue line.

Also the external drive that is working says NTFS under File System, where the drive that isn't working says nothing.

Another weird thing is that the drive that is not working says 3.86 GB with and unallocated underneath it, where it is a 1 TB drive. The drive that is working correctly says the proper amount of space that it holds.

I followed all the steps and found the OEM and it says "mounting of new volumes enabled" but I can't get the drive to show up anywhere. I is acting as if nothing has changed. Like I said, I really don't know much about this stuff, but I can't get it to open. I don't know if has anything to do with the fact that I have vista, but I am still lost. I'm going to keep everything up exactly how it is, so if you have any other suggestions, I will be ready for them. Thank you for helping me out so much.

yeah, it says the same thing.