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- From: vpk2!john@attcan.uucp
- Newsgroups: comp.virus
- Subject: Virus-like behavior of DOS 5.0 chkdsk (PC)
- Message-ID: <0006.9211121950.AA09997@barnabas.cert.org>
- Date: 11 Nov 92 14:09:43 GMT
- Sender: virus-l@lehigh.edu
- Lines: 48
- Approved: news@netnews.cc.lehigh.edu
-
- This is an excerpt of a message I posted to comp.os.msdos.misc,
- that I thought might be of interest.
-
- (This is NOT an official report from Microsoft or AT&T. It's just
- my own friendly posting to try to help)
-
-
- Program: chkdsk
- O/S : MS-DOS 5.0
-
- Symptoms: Users running chkdsk with the /f option have 256 copies
- of the FAT written onto their hard disk starting at the
- first copy of the FAT. The result being that all directory
- information and a significant amount of the data in the data
- area are irrecoverably destroyed.
-
- Affected users: Any users using 256 sector FAT's.
-
- How to tell if you're at risk:
-
- Run chkdsk WITHOUT the '/f' option and check the
- "Total allocation units on disk". If this number is
- more than 65280, you're at risk. DO NOT USE CHKDSK TO
- CORRECT ANY DISK PROBLEMS if this is the case. You'll
- trash your disk.
-
- Solution: Call Microsoft and request the 5.00A upgrade. They know
- about the problem and they've fixed it. They've also done
- some diddling with the following programs: (though I don't
- know what they did to them.)
-
- deloldos.exe diskcomp.com diskcopy.com
- doshelp.exe dosshell.exe dosswap.exe
- emm386.exe expand.exe format.com
- himem.sys mirror.com qbasic.exe
- recover.exe setver.exe undelete.exe
- xcopy.exe
-
- ______Opinions stated are my own. Transcripts available by request______
- ===
- =--==== AT&T Canada Inc. John Benfield
- =----==== 3650 Victoria Park Ave. Network Support Analyst (MIS)
- =----==== Suite 700
- ==--===== Willowdale, Ontario attmail : ~jbenfield
- ======= M2H-3P7 email : uunet.ca!attcan!john
- === (416) 756-5221 Compu$erve: 72137,722
-
- ____Eagles may soar, but weasels don't get sucked into jet engines._____
-