[comp.sys.mac] My folder from Hell has had a baby

psrds@warwick.ac.uk (Dr T A Harley) (03/27/90)

Not only is my machine possessed by a folder from Hell, but it has now
replicated.

Many thanks to those who offered suggestions.  However, command-option-
trashing didn't work;  Apple's Disk First Aid gave me "An internal error
has occurred - cannot continue" while verifying, and stopped, and then
another folder became a folder from Hell when I tried to overwrite it.

SUM DiskFirstAid gave the following error messages:
  Allocation map is invalid
  Directory is bad

What exactly do these mean, can they be repaired (SUM II won't), or do
I have to reformat my hard disk?  What are the consequences if I don't?