User`s guide

DLT MiniLibrary (TL891) - User’s Guide
1–4 EK–TL891–UG. A01
1.2.4 Integral Fan Cooling
A single forced-air fan is positioned on the rear panel to provide optimum
cooling for critical parts, and to prevent the drive and robotics electronics,
motors and power supply from overheating.
1.2.5 Library Robotics
The DLT MiniLibrary features library robotics that can load any of the cartridges
in the system into either of two TZ89N tape drives from its own removable
10-cartridge magazine.
1.2.6 Bar Code Reader
The bar code reader is mounted on the cartridge shuttle. It reads bar code labels
attached to each cartridge and to the magazine, and maintains the bar code data
in memory as part of the library inventory records.
1.3 Advanced Design Features
The DLT MiniLibrary incorporates many significant improvements in tape drive
and library design. One of the most important is the use of highly reliable DLT
technology, with media rated at better than 1,000,000 head passes.
1.3.1 Embedded Diagnostics
The DLT MiniLibrary Base Module provides three levels of embedded
diagnostics. The Power-On Self Test (POST) performs various verification tests
on the processor’s host interface and device control functions, as well as memory
tests, at power-up. The second level of diagnostics is the User Diagnostics. These
include provision for changing configuration options, and diagnostics under the
Demo menu to assist the user in diagnosing faults. The third level, CE
Diagnostics, include more advanced diagnostics to be used by Customer
Engineers for servicing the Base Module. Both the User Diagnostics and the CE
Diagnostics may be selected from the front panel.
Diagnostics are described in greater detail in
Chapter4 - Configuration
(configuration diagnostics) and
Chapter 5 - Diagnostics and Troubleshooting
(remaining user diagnostics).
1.3.2 Error Checking
The TL891and TL892 Base Modules apply a 16-bit parity check to each record,
a 64-bit CRC to each 4kB of data, and Reed-Solomon error correction code
overall. In addition, there is an internal parity check on the data buffer.