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PKWARE.BUG
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1993-01-09
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53 lines
The PKWare forum on CIS is full of reports of file
corruption, memory allocation problems, CRC errors, disk span problems,
AV problems, and more. I have tried to pull out the most significant
reports and summarize them here.
Reported PKZIP 2.04c bugs/problems/anomolies/caveats:
Feel free to report all ZIP 2.04c problems here.
1. The Volume Label ("$") switch does not work.
2. The Norton anti-virus program will report the "Maltese Amoeba"
virus when scanning PKZIP. It's a false report, not a virus.
3. If you have problems running PKZIP/UNZIP from Windows 3.1, you
may have to follow the steps outlined in MANUAL.DOC to disable
the DPMI detection/use.
4. Please report any corrupted files here. One user reports 60 megs
worth of files destroyed due to corruption after converting ARJ
to ZIP 2.04c files!!! Another user reports some corrupted files
after using 2.04c on a network.
5. Be careful using the "-&f" and "-&fl" switches. The "quick
format" can be a nasty trap for the unsuspecting. The quick
format zeros the FAT and the directory area of a previously
formatted disketted. The problem is that if a user quick formats
a diskette that has bad sectors marked in the FAT, these sectors
are no longer marked and DOS will eventually write over them.
DOS will routinely write to a bad area on a disk but will refuse
to read such areas. BEWARE!
6. If you are restoring from a multiple disk backup set, PKUNZIP
will prompt you to put the next disk in the drive. It does NOT
properly detect and trap the DOS "Drive not ready.." error. It
will NOT detect the situation where the user places the wrong
sequence diskette into the drive and will erroneously report that
the ZIP file is corrupt!
7. The PKWare strategy to backup disks is flawed and dangerous. It
requires that _all_ of the backup disk set be present and
undamaged. If first disk is damaged, the entire backup set is
lost.
8. If you use the "-rp" switch to zip files recursively and store the
paths, PKZIP 2.04c will now place an entry in the ZIP file directory
for EACH subdirectory recursed into that looks like this:
0 Stored 0 0% 01-07-93 09:30 00000000 --wD ONE/
9. Lots of reports of file corruption and unexplained CRC errors.