This message indicates that the HFS (Macintosh) file system that was mounted by Irix appears to be corrupt.
This problem is commonly caused by one of the following:
The filesystem is corrupt. Check that the file system is okay by running the PC/HFS file system checker fpck on it, for ex: fpck /dev/rdsk/dks0d4s or reinitialize the file system on a PC or Macintosh (as applicable.)
The media is bad. Replace the media and try again.
The device that is reading/writing the media may have a hardware problem.
If the problem continues, contact your System Administrator or your service provider.
For information on how to configure or disable System Alerts, click here.