Unfortunately, you have corrupted your geodatabase data dictionary. Even if you used the
safest command-line option available ('sdetable -o delete') you would still have corrupted
metadata (no binary in $SDEHOME/bin is geodatabase aware).
You may be able to use ArcCatalog to delete the remaining feature class fragments, though
you might need to recreate the raster column before a GUI delete would be fully successful
(Tech Support would be a great resource at this point).
The exact steps for SQL maintenance to clear the corruption depend on the version of ArcSDE
in use, and, if necessary, are better executed under the close supervision of Tech Support.
- V