Summary
Cyclic Redundancy Check (CRC) error occurs, causing a tape to be marked as full.
Resolution
The cyclic redundancy check (CRC) error is generic in nature and can be caused by numerous factors. Typically this means that a tape read/write error has occurred. This is usually caused by dirty read/write heads in the tape drive. Clean the tape drive and try the job again.
If the problem persists, consider trying a different tape.
Finally, the problem could be with cabling, termination or other hardware issue. In these cases an event may be logged in the Operating System logs.
The following list contains the most common reasons for this error and potential ways to resolve the problem:
- Contaminated read/write heads of the tape device:
Check with the hardware manufacturer for proper cleaning techniques.
- Bad media:
Replace the media. Try a new tape that is certified by the hardware manufacturer.
- Tape driver:
Verify that you are running the latest driver supply by the hardware manufacturer or operating system vendor.
- 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 a narrow (50 pin) SCSI device, disable wide negotiation. Use the manufacturer's SCSI setup program to disable wide negotiation on the SCSI controller card.
- 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 for the proper configuration for SCSI transfer rate.
- 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 for the proper configuration for SCSI synchronous negotiation.
- Incorrect termination or bad cables:
Verify that the SCSI cable is good and is configured to provide proper SCSI termination. Do not mix passive and active termination.
- Confirm that the tape drive is functioning properly:
Check with the tape drive manufacturer for diagnostic software to test the condition of the tape drive hardware.
- General SCSI problems:
Isolate the tape drive on its own controller card.