This article offers troubleshooting advice for a checksum error message presented by the Macintosh Server G4 after performing a software restore.

A checksum error can occur after running the Apple Software Restore (ASR) to restore an image (from CD) of Mac OS 9.0 or AppleShare IP 6.3 on to a SCSI drive that uses the SoftRAID v2.2 or v2.2.1 driver. Refer to Figure 1 for the complete error message text. The system does not crash or hang and a graceful exit is allowed.

Figure 1 Checksum Error Message Dialog Box

If you experience this error, it can be eliminated and the software restore allowed to complete successfully by following these steps:

1. Launch the SoftRAID v2.2 or v2.2.1 application.

2. Select the drive to be restored to ( Note: The SoftRAID application will automatically update the drivers on all SoftRAID controlled drives.)

3. Select Install Driver from the Disk menu.

4. Turn off Read Acceleration and Write Acceleration.

5. Close the window and quit the SoftRAID application.

6. Restart the computer to put the driver update into effect.

7. Retry the ASR; it should complete successfully.

8. Read Acceleration and Write Acceleration can be turned back on if desired.