emigh@ecsvax.UUCP (07/17/86)
I have just spent the better part of a day recovering from a romp PC/SAS
took through my hard disk on an IBM-AT. Apparently, PC/SAS was modifying
random clusters on the disk without the formality of opening and closing
the files. This meant the files were modified without the date on the
directory being updated. The only way I found this out was that one of
the files it modified was the SASGLM.EXE file. I was demonstrating "how
neat PC/SAS" was on a simple problem when the display went wild.
Anyway, PC/SAS was modifying the files in such a way that a
cursory inspection would not let me know it had been modified. Fortunately,
I had not backed up the hard disk since installing PC/SAS, so I was able
to get clean copies of all my programs, and was able to fix *MOST* of the
data by hand. I am frightened by thinking about what would have happened
if I had backed up the bad files without realizing it!!!!!
My question is this: Are there any programs that check for file integrity?
I would like a program that will keep a file of CRC's for all the files on the
disk. Then before a backup, I would run the program to make sure that the
CRC's are the same for those files that have not been modified. Public
domain would be wonderful, but if I plan to ever use PC/SAS again, I will
need whatever is on the market. If not, I guess I'll have to write my
own (sigh).
--
Ted H. Emigh Genetics and Statistics, North Carolina State U, Raleigh NC
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--
Ted H. Emigh Genetics and Statistics, North Carolina State U, Raleigh NC
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