Important Note to Users of Disk Drives With Over 32 MB Capacity
It is extremely important that you upgrade to System 4.1 if your Macintosh
computer is attached directly to a hard disk with a capacity of 32 megabytes
or more.
There is a bug in versions of the system file prior to 4.1 which makes it
unsafe to use disk drives larger than 32 MB. Note that there are special
instructions for owners of disk drives over 134 MB as well.
-- Instructions for disks over 32 MB but less than 134 MB:
Use the installer to install System 4.1 and Finder 5.5 on the
startup disks of all Macintosh Plus, SE, or II computers.
For Macintosh computers dedicated as AppleShare servers, shutdown the
server, restart from the Macintosh System Tools disk Version 2.0, and use
the Installer to install System 4.1, Finder 5.5, Chooser 3.1, etc., in the
server folder on the server startup volume. When the install is complete,
you may restart the server Macintosh as an AppleShare server by choosing
Restart in the Special menu.
For the Macintosh II, and ideally the Macintosh Plus and Macintosh SE
servers too, use the Install program that accompanies AppleShare 1.1.
Doing so also updates the System, Finder, Chooser, etc., as well as
updating AppleShare to Version 1.1 (neccessary for the Macintosh II).
Instructions for disk drives with 134 MB or more which were initialized
with System 3.3 or earlier (creation date January 12, 1987 or earlier):
Since system versions 3.3 and earlier were not capable of correctly
formatting disks over 134 MB, you need to reformat the disk with
System 4.1.
1. Backup all information on the hard disk to another device using a
file by file backup (the Finder will do). Image Backup utilities
are not acceptable, since image restoration will preserve the bad
format.
2. Reformat the hard disk using System 4.1
3. Restore the information back to the hard disk using a file by file
technique.
4. Update the System and Finder versions to 4.1 and 5.5, respectively.