Apple Macintosh System 7.5 - Manual (Page 15)

Step 3: Prepare your computer for new system software
To ensure a smooth upgrade to the new system software, it’s important that
you check your hard disk for problems and update the driver. The steps to
update the driver vary slightly depending on the type of computer you are
installing the software on.
IMPORTANT If you’re installing software over a network, make a Disk Tools
disk from the appropriate disk image on your file server. If you need more
information, ask your network administrator.
Check your hard disk
1 Shut down your computer.
2 Insert the Disk Tools disk for your model of computer into the floppy disk drive.
Note that the following Disk Tools disks come with your upgrade kit:
m Disk Tools 1: for most 68K computers (the 68K computers that are
exceptions are listed below)
m Disk Tools 2: for PowerPC computers and 68K computers that have
an IDE hard disk, which include the Macintosh LC 580, LC 630,
LC 630 DOS, Quadra 630 series computers, Performa 580 series
computers, Performa 630 series computers, PowerBook 150, and
PowerBook 190 series computers. Also, if you have a 68K computer
and have installed a PowerPC Upgrade Card, you should use the
Disk Tools 2 disk.
3 Turn on your computer.
The Disk Tools icon appears on your screen. If you see an error message on
the screen telling you the wrong Disk Tools disk was inserted, look for the
other Disk Tools disk in your kit and insert it.
4 Double-click the Disk First Aid icon and follow the instructions on the screen.
Disk First Aid checks your hard disk for problems.
7 Installing System Software