Iomega External Hard Drive: "Invalid content in journal" - HELP!!

Greetings,
My Iomega Prestige external hard drive has just developed a problem—the exact same problem addressed in a 2008 thread in these discussion boards. I can no longer mount the HD on my desktop.  I have run Repair Disk in Disk Utility.  The following error shows up in red:  "Invalid content in journal."  There's a bunch of additional gobbledy-gook, but Disk Utility then tells me that "The volume Prestige was repaired successfully."  Alas, not so.  I still cannot mount the disk, and when I run Verify Disk in Disk Utility, the same error appears.  Endless cycle, pain in the butt.
As I said, this exact same problem was addressed in a 2008 thread (I hope that link works), and a solution was proposed using Terminal and the instructions posted here.  Well, that was six years ago, and I cannot get that solution to work now.  I have a two-year old MacBook Pro with an Intel processor, and I have Mac OS 10.8.5.
Can somebody please help me out?  Please?!

Do you have access to another computer to see if the drive will mount there?
I obviously don't know what is on the drive, but reformatting the drive might help.

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