9840 Troubleshooting and Recovery
9840 Tape Drive Operations Guide—429596-002
A-3
DumpAgain? Message
Cause. Some data remains unwritten to tape.
Cause. Loss of this data occurs if you press the Unload switch again. Before pressing
Unload again, you must issue the following command sequence : In the SCSI
environment: Recover Buffer Data. This allows the NonStop system to save the
unwritten data.
DumpAgain? Message
Cause. The “DumpAgain?” message alternates with a “CHK xxxx” fault symptom code
indication while the Service light flashes. This occurs when the identical “CHK xxxx”
fault symptom code is detected within one minute.
Cause. The tape drive becomes non-operational and requires manual intervention.
Cause. With this condition, you may choose to take a dump, but there is no
requirement to do so. If you have reason to take the dump, press any control except
the IPL switch. This saves the dump data to the EEPROM. While the dump is being
saved to the EEPROM, the Service light goes out and the display alternates between
“SavingDmp” and the “CHK xxxx” display. After saving, the tape drive automatically
IPL’s.
Refer to Writing the Diagnostic Dump Tape to File on page A-4 to copy the dump data
from EEPROM to tape or a file.
If you do not want to take the dump, press the IPL switch. This IPLs the tape drive
without copying the dump data to the EEPROM.
•
If the IPL fails, as indicated by any error message, contact your service provider to
replace the tape drive.
•
If the IPL is successful, continue with normal operations.
Identifying Unrecoverable Tapes
An unrecoverable defective tape, including a degaussed tape, fails in all operations or
most operations. A failing tape on one drive should be tested on another drive. If the
tape fails on both drives, the tape is most likely bad. To confirm this conclusion:
1. Take another tape and test it on the original drive on the same operation that
previously failed. If the operation does not fail with the new tape, conclude that the
previous tape is probably defective.
2. Use the Reclaim Menu to reformat the original tape. Refer to Appendix B, 9840
Menu System. If the Reclaim Menu rejects the tape, the tape is unrecoverable and
must be discarded.
Caution. Do not degauss 9840 tapes. Servo tracks are written on the tape at the factory.
When these tracks are mistakenly erased as by degaussing, you must discard the tape
cartridge.
