help with MY Book external drive

[AN]

I just purchased a WD MY Book external USB disk, I reformatted in UFS and 
created a filesystem with sysinstall.  I was able to put data on it successfully, 
however overnite I had a power failure.  Now I am unable to mount the 
drive.  The blue light is on, so it seems to be getting power but the 
computer does not see it when I plug in the USB cable.  I can not run fsck 
because the system says /dev/da0s1d no such file or directory.  I tried 
da0s1, da0s1c, and da0s1d no luck.  I also tried to plug the disk into 
another machine, same thing the disk is not recognized.  Is it totally 
gone?    Any help to recover this disk would be really appreciated.

TIA