Appendix B

EEPROM-RESIDENT BUGCHECK AND EVENT LOGS

This appendix provides an explanation of the event logs (information packets) stored in semi- permanent, non-volatile memory of the tape drive. These packets can be retrieved via the SCSI LOG SENSE command with Page Code 07h.

B.1 EEPROM PACKETS (LAST N EVENTS)

The tape drive keeps certain event logs in semi-permanent, non-volatile memory (EEPROM, in this case) located on the tape drive’s controller PCB. There is storage enough within EEPROM for a total of 14 of these logs, or packets, each packet consisting of 98 bytes (96 data bytes plus two control bytes) of information. Packets may be written for different reasons and several packet types exist.

The information in the event logs does not indicate that a tape drive or tape medium has failed but is useful in isolating problems that may be occurring.

The logs are maintained in a circular buffer: a new entry overwrites the oldest existing entry. At any point in time, the most recent 14 logs are kept.

The EEPROM information packets can be retrieved via the SCSI-2’s LOG SENSE command with Page Code 07 (Last n Error Events Page).

The packet type field defines the content as well as the format of the data portion of the packet. These packet types are detailed in this Appendix. Note that the byte offsets in the structure layout diagrams are reference relative to the beginning of the 98-byte EEPROM log envelope.

Quantum DLT 7000 Tape System

B-1

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Quantum Instruments DLT 7000 manual EEPROM-RESIDENT Bugcheck and Event Logs, Eeprom Packets Last N Events
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DLT 7000 specifications

The Quantum Instruments DLT 7000 is a state-of-the-art battery-powered light that brings advanced photography and videography offerings to professionals and enthusiasts alike. Renowned for its compact design, the DLT 7000 combines lightweight portability with powerful functionality. It is engineered to enhance the creative process by providing optimal lighting solutions in a variety of settings.

One of the standout features of the DLT 7000 is its innovative LED technology. This light source offers consistency in color temperature and output, ensuring high-quality illumination for both photo and video applications. The unit boasts an impressive color accuracy with a CRI (Color Rendering Index) rating that exceeds 90, making it ideal for capturing true-to-life colors in any situation. The DLT 7000 allows users to adjust the color temperature from a warm 3200K to a cool 5600K, catering to different lighting needs and environments.

Moreover, the DLT 7000 features a dimming function that allows for seamless adjustments from 0 to 100% brightness. This level of control not only aids in achieving the perfect exposure but also helps in creating the desired mood or atmosphere for a shot. The robust design of the DLT 7000 includes durable construction material that can withstand the rigors of location shoots, making it a reliable tool for professionals.

In addition to its lighting capabilities, the DLT 7000 incorporates smart technology. It is equipped with a built-in wireless control system that allows users to adjust settings from a distance, promoting flexibility during shoots. This wireless functionality extends to multiple units, enabling synchronized lighting setups for complex scenes.

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In summary, the Quantum Instruments DLT 7000 stands out with its combination of advanced LED technology, adjustable color temperatures, built-in dimming capabilities, and smart wireless controls. Whether for professional photography or videography, this light is designed to meet the demands of the most discerning artists, making it an essential addition to any lighting kit.
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