Classic Computer Magazine Archive COMPUTE! ISSUE 123 / NOVEMBER 1990 / PAGE 17

Disk to Disk

How can a file larger than 360K be copied from a 3½-inch disk onto a 360K 5¼-inch disk?


A disk's capacity can be increased by using a file-compression or archiving utility. You can place several files into one compact file and transfer the compressed file to another disk. If you want to run the file after you transfer it to the 360K disk, you need a compression utility such as Shez, which allows you to run compressed files. Most compression utilities don't offer this feature.

Most archiving utilities allow the user to create self-extracting files. To uncompress a self-extracting file, you type the filename like any other executable file. Usually, a self-extracting file is 4–10K larger than a normal compressed file. This should be taken into consideration when you're compressing your files.

ARC is a compression utility in the public domain. Two shareware archiving programs that provide slightly higher file compression than ARC are Phil Katz's PKZIP and Haruyasu Yoshizaki's LHARC. Shez is in a class all by itself. It offers a DOS environment from which you can read documentation files, run executable files, uncompress any number of files from a compressed file; and it has many more options. These programs can be downloaded from GEnie, CompuServe, or most local BBSs.