The error message "Data error (cyclic redundancy check)" is reported in the Backup Exec for Windows NT v8.x log file and the backup/verify operation fails
TechNote ID: 192216 Last Updated: June 20 2002 10:59 AM GMT
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Symptom:
The error message "Data error (cyclic redundancy check)" is reported in the Backup Exec for Windows NT v8.x log file and the backup/verify operation fails
Exact Error Message:
Storage device "[]" reported an error on a request to read/write data to/from media.
Solution:
The "Cyclic Redundancy Check" (CRC) error is generic in nature and can be caused by numerous factors. The following list contains the most common reasons for this error and potential ways to resolve the problem:
1. Contaminated read/write heads of the tape device.
Check with the hardware manufacturer for proper cleaning techniques.
2. Bad media.
Replace the media. Try a new tape that is certified by the hardware manufacturer.
3. Tape driver.
Load the appropriate Backup Exec tape driver.
4. SCSI controller wide negotiation enabled.
Use the manufacturer's SCSI setup program to disable wide negotiation on the SCSI controller card.
5. SCSI controller wide negotiation.
If the device is a wide (68 pin) SCSI device then wide negotiation may and should be used. If the device is narrow )50 pin) SCSI device, disable wide negotiation.
6. SCSI controller transfer rate is too fast.
Use the manufacturer's SCSI setup program to lower the SCSI transfer rate. Check with the controller and backup device manufacturer fir the proper configuration for SCSI transfer rate.
7. SCSI controller synchronous negotiation enabled.
Use the manufacturer's SCSI setup program to disable synchronous negotiation on the SCSI controller card. Check with the controller and backup device manufacturer fir the proper configuration for SCSI synchronous negotiation.
8. Incorrect termination or bad cables.
Verify the SCSI cable is good and for proper SCSI termination. DO NOT MIX Passive and Active termination.
9. Confirm the tape drive is functioning properly
Check with the tape drive manufacturer for diagnostic software to test the condition of the tape drive hardware.
10. General SCSI problems.
Isolate the tape drive on its own controller card.