Dear Fang-Yao Disk first aid is very rudimentary - you need to check the disk out and perhaps attempt to repair the directory with something like Disk Warrior from www.Alsoft.com (about $65 from outpost.com). I had a bad zip disk full of data - Norton utilities froze up trying to fix it - Disk warrior did the job. Disk warrior is a "one trick pony" there are many things it does not do. So as with any OS you need a kit bag of utilities to take care of problems as they arise. Disk warrior is worth having around even if it fails you on this occasion and you have to use a data recovery service - it will certainly save you at some other time. Disk warrior is very safe to use - it creates a new directory structure and locks the old and new directories, allowing you to inspect them to make sure everything is accounted for before accepting the new directory structure. Peter Moore ***************************************************************** Peter F. Moore Professor VM Pathology, Microbiology and Immunology 1126 Haring Hall School of Veterinary Medicine University of California Davis, CA 95616 USA Tel. 530 752 5204 Fax 530 752 3349 email pfmoore@ucdavis.edu *****************************************************************
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