Disk repair for external hard drive

Hi, I gave my son an external hard drive to back up his school work, besides the normal backups of on the Time Capsule. So how he managed to hget the external hard dirve disappear from the screen while there is no back up left on the TC.
I have tried disk utility an number of time on several computers to get the External hard drive working. No luck there. I have tried restore in disk utility, but I cannot get the source and destination righty for a reason.
I have read an advice of Francine Schwieder dating back to 2007 where she advised to run terminator, this is the result I get while the xternal hard drive was connected to my Imac.
Last login: Sun Oct  9 22:14:37 on ttys000
imac-chf-baak:~ charles2008$
Last login: Fri Dec  7 20:58:20 on console
iMac:~ charles2008$
iMac:~ charles2008$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            999.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *1.0 TB     disk1
   1:                  Apple_HFS lucas hard drive        1.0 TB     disk1s1
iMac:~ charles2008$
Last login: Fri Dec  7 21:19:20 on ttys000
iMac:~ charles2008$
With my limited knowledge, was a partition placed on this external hard drive ? I cannot see or acces the external hard drive.
Is there anyone who can help me with this ?
Hope to hear from you.
Charles
Francine Schwieder Southern Cal

If you wan to give Data Rescue 3 a spin (I'm testing it out now for the first time) you can get it - and a number of other apps - for $50 from MacUpdate's December Bundle.
Because I have redundant backups, I've never used either DiskWarrior or Data Rescue 3 - but I wanted to try it so that I will be able to know how well it works (or doesn't).
Clinton

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