Apple Macintosh Performa 570 series - Manual (Page 79)

5 Click Init to initialize the hard disk.
6 If a message appears asking you to name the disk, type a name and then click OK.
7 Click Quit when you see a message reporting that initialization was successful.
If a message reports that initialization failed, try again. If initialization fails
a second time, take the disk to your Apple-authorized service provider for
repair.
71 Troubleshooting
Click here to initialize the disk.