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error 206 with Quantum SuperLoader 3120L

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New installation of OS X 10.2.3 with Retrospect 5.0.238 and RDU 3.4.103. I have most current Adaptec 29160 drivers for OS X.


Backup hangs on random files. Then I get the following error written to the log.


- 2/21/2003 1:57:17 PM: Copying OSX…

Trouble writing: “1-Backup Set A” (40894464), error 206 (drive reported a failure: dirty heads, bad media, etc.).

Additional error information for device "Quantum SuperDLT DC" [0:1],

Sense > f0 00 03 00 00 00 10 16 00 00 02 8f 0c 00 00 00 00 00

(QUANTUM |SuperDLT1 |2A2A)



Any help would be great.


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Error 206 (media failure) indicates trouble reading from or writing to the backup set medium. This error is always generated by the backup device and is usually due to one of four causes:


1. The media is physically defective and needs to be replaced. Try using a different tape, CD or cartridge.


2. The heads on the tape drive are dirty and need to be cleaned. Consult the manual that came with your tape drive or contact the drive manufacturer for cleaning recommendations.


3. Another device is causing interference. If you have a drive immediately next to another electronic device try moving the devices further apart. Try removing one or more devices temporarily to see if there is some other device conflict. Try using your backup device on another computer to see if interference is caused by your monitor or other nearby electronic devices. Also see ?SCSI Issues? in the Retrospect Users Guide.


4. Retrospect can also report error 206 when a crash or power failure interrupts the backup computer or tape drive. Helical scan tape drives such as AIT, DAT, DTF, Exabyte 8mm and AME 8mm require an end of data (EOD) marker on a tape to append data. If a tape does not have an EOD marker Retrospect may report error 206 (media failure) when it next tries to write data to the tape. Tape drives are responsible for writing EOD markers but a drive may not get the chance if you shut down or restart the backup computer or the power is interrupted.


To avoid problems take the following precautions: do not disable the "Verification" option in scripts and immediate operations; let the tape drive fully rewind or eject the tape before you power off or restart the computer; and if the computer crashes try to eject the tape (using the drive's eject button) before restarting or turning off the computer.


When Retrospect reports error 206 on a tape because it lacks an EOD marker that tape is unusable for future appends until you erase it, though it is not physically damaged and you can use it to restore. The tape cannot be repaired with Retrospect's repair tool. To use the tape for additional backups or archives you must first either reset the tape's backup set from Configure>Backup Sets or erase the tape from Configure>Devices.


When the error persists on multiple media and you have eliminated the above possibilities the device may be failing. Contact the vendor.

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