External hard drive not readable

I have a Seagate 60 GB  and a WD 120 external hard drives that have been using on my macbook for about a year and it's formated to work on a mac. Recently, whenever I plug it in, it says that the disk is not readable. It shows up on disk utility, but nowhere else. It says not supported after SMART status. verify disk is not available. nor are repair disk, verify disk permissions, or repair disk permissions.
I've never traveled with them before, I dont know if maby something happened in the airports or something.
Please help.

So I guess this means I've lost this information??
There's a good chance that that's true, but there is still hope of recovering it. Assuming you have your Mac working, download one or both of these data recovery utilities and see whether they tell you that some or all of your data is recoverable. Both utilities are offered in free demo versions that will show you exactly what you'd be able to recover with the full, purchased version. Note that everything you recover must be saved to a different disk from the one it's being recovered from. If your Mac's internal drive is large enough to accommodate everything you may want to recover, that will be OK.
Data Rescue 3: http://www.prosofteng.com/products/data_rescue.php
FileSalvage 7: http://subrosasoft.com/OSXSoftware/index.php?main_page=product_info&products_id= 1

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