Most system errors sound like gibberish to most of us, but if you were
writing a new program for the Macintosh, the error number would tell you
that you have a problem with your code. But, when you are running a
compiled program and get this error, all it tells you is that the software
crashed. Some errors, like 25, are "out of memory." This one does make
sense. In your case, check through these possible problems:
1) This is a third-party drive that was formatted with HD Setup. You
have to use a utility from the third-party manufacturer to format a
third-party drive. Apple's utility is only for Apple's hard drives.
2) The hard drive is defective.
3) Some other file within the System Folder is causing the crashes: a
screen dimmer, startup sound, electronic mail, or something similar.
4) The computer could have a memory problem in RAM or the logic board.