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Appendix B: EEPROM-Resident Bugcheck and Event Logs
B-2 Quantum DLT 7000 Tape System
B.2 BUGCHECK PACKETS
Bugchecks are the result of some software-detected errors. For example, a
hardware failure or an internal system consistency failure may cause a bugcheck.
These events cause bugcheck packets to be written to EEPROM.
The most important information within the packet is the error code. The more
common bugcheck codes are listed in Table B-1. A full listing of all possible
codes is not provided: they are typically associated with firmware or product
development and are not expected once the product is released. Analysis of the
other information saved within an EEPROM bugcheck packet requires the in-
depth firmware knowledge to interpret and/or attempt to determine the actual
cause.
Table B–1 Bugcheck Packet Error Codes (Bytes 9 – 10)
Error Code Meaning and Possible Cause
E204h Unexpected Timer 2 Interrupt – Possible Tape Drive Controller PCB fault
EE01h Spurious Non-Maskable Interrupt – Possible Tape Drive Controller PCB fault
EE02h Spurious 8524 Timer Interrupt – Possible Tape Drive Controller PCB fault
EE03h Spurious Level 5 Interrupt (GPSP) – Possible Tape Drive Controller PCB fault
EE04h Spurious Drive Comm Interrupt – Possible Tape Drive Controller PCB fault
EE05h Spurious Loader Comm Interrupt – Possible Tape Drive Controller PCB fault
EE06h Spurious Diag Comm Interrupt – Possible Tape Drive Controller PCB fault
EE08h Watch Dog Expiration – SCSI bus may have lost termination, or Tape Drive
Controller PCB is constantly receiving non-tape commands.
EE09h Spurious Power Fail Signal Received – Possible Power Supply fault.
EE0Dh Spurious Level 6 Interrupt (GPSP) – Possible Tape Drive Controller PCB fault
F202h Loader Time-Out – Possible Media Loader fault
B.2.1 POST Failure Packets
POST failure packets are stored whenever the Power On Self Test logic detects a
failure of any kind. Each failure is encoded as a 4-byte vector. In some cases,
multiple vectors may be stored.
If logging of POST failures occurs, contact a service representative.