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- Title: LZWBACKUP
- Author: Ian Prideaux (i-pridea@csd.uwe.ac.uk)
- Version: 1.0
- Title From: Documentation
- Author From: Documentation
- Version From: Documentation
- Supplier: Ian Prideaux (i-pridea@csd.uwe.ac.uk)
- Date: 20/11/94
- Keywords: Back up programs ; File compressors
- Shareware: No
- Machine: Archimedes
- Operating system: RISCOS
- Memory requirements:
- Peripherals needed:
- Other s/ware needed:
- Directory: micros/arch/riscos/c175
- Date mounted/updated: 06/12/94
- File names: lzwbackup.arc
- Unarchived files: 32
- Unarchived size: 201 kbytes
- Omissions:
- See also: HDBACKUP (c171), KEEPER (b039), BACKUP3 (a163), BACKUP (a055)
-
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-
- Acquiring the package:
-
- Download the archive file(s) and extract using SparkPlug 2
- (see the "tools_help" file in micros/arch/riscos/tools for further info).
-
-
- Description:
-
- LZWBackup makes a backup of files from a hard disc onto floppy discs. It
- creates one file on each floppy, and stores compressed versions of the files
- to be backed up. This should take fewer floppies to back up a given number
- of files because:
- a) most files get 30% ish knocked off them by the compression.
- b) compressed files are concatenated into one file, hence there are no cluster
- losses i.e. a 700 byte file takes up a whole 1Kb sector, hence wasting the
- other 300 bytes.
- c) directories (if stored at all) are stored by name only, hence do not take up
- a sector to themselves.
- The compression routine is implemented by John Kortink's LZW module, both
- versions and the documentation are included.
-
- LZWrestor will list the contents of a floppy and restore the entire contents
- of the floppy to their original place in the directory structure. It is
- incapable of selecting files from the floppy or of specifying where they go
- (This is a couple of things that may change in a later version).
-