Apple Macintosh Performa 600 Series - Manual (Page 74)

3 Choose Scan For Defects in the Functions menu.
If the program finds damaged blocks, it marks them so the computer will not
store information in them. This process does not harm any information on the
hard disk.
Testing an external SCSI hard disk
You can test an external Apple SCSI hard disk with the Apple HD SC Setup
program, which is on the Macintosh Performa CD or the Utilities disk—
whichever came with your computer.
1 Start up your computer from the Macintosh Performa CD or the Utilities disk.
See “Starting Up From a CD-ROM Disc” or “Starting Up From a Floppy
Disk,” earlier in this section.
2 Open the Apple HD SC Setup program.
3 Click Drive until the disk you want appears.
67 Troubleshooting
SCSI ID number of the currently selected hard disk
Name of the currently selected hard disk