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- Newsgroups: comp.compression
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!uchinews!ellis!roe2
- From: roe2@ellis.uchicago.edu (Cave Newt)
- Subject: Re: PKZip 2.04c quick impressions
- Message-ID: <1993Jan5.172729.23504@midway.uchicago.edu>
- Sender: news@uchinews.uchicago.edu (News System)
- Reply-To: roe2@midway.uchicago.edu
- Organization: University of Chicago
- References: <rdippold.726235592@cancun> <bontchev.726251313@fbihh>
- Date: Tue, 5 Jan 1993 17:27:29 GMT
- Lines: 38
-
- bontchev@fbihh.informatik.uni-hamburg.de (Vesselin Vladimirov Bontchev) writes:
-
- >You should compare it with PKZIP 1.93 - theoretically it should have
- >the same compression ratio, unless they have invented something really
- >new, which I strongly doubt...
-
- There was room for tweaking within the current format. Info-ZIP's
- Zip gets slightly better compression than PKZIP 1.93a on some files.
-
- >I doubt that the Info-ZIP product can be made to use a
- >more intelligent way to handle multi-volume archives if it wants to
- >stay compatible... Unless they decide to implement both ways - the
- >silly one in the new PKZIP and a more intelligent and straightforward
- >one...
-
- Hmmmm...maybe. It would certainly be easy enough to add a same-disk
- option to Zip which would create ARCHIVE.001, ARCHIVE.002, etc. We
- could even make a program to copy the archives to floppies, rename
- them and create the appropriate PKDISK#.xxx file (possibly as a batch/
- command file, but I don't recall how to create an empty file without
- "touch").
-
- We'll have to discuss this amongst ourselves. Brilliant ideas/suggestions
- may be sent to info-zip@wkuvx1.bitnet... :-)
-
- >> It did handle it nicely when I threw a floppy with a bad sector at it.
- >> It just stopped packing at that point and asked for the next disk, and
- >> continued from there.
-
- >Hmmm, a better solution would be to just skip to the end of the
- >compressed -image- of the file that contains the bad sector and to
- >continue with the next file from the same disk...
-
- He was talking about packing, not unpacking. Getting rid of the bad
- disk is the proper response when writing the archive.
-
- Greg Roelofs
- Info-ZIP guy
-