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Tandberg Data LED Bahavious
36 Tandberg LTO HH Installation and User Manual
NOTE 1:
Some of the states are difficult to see due to short duration.
NOTE 2:
LEDs are also used to indicate fatal errors at an early power-up stage. This is accomplished by turning the LEDs
ON one-by-one:
• The Ready LED as early as possible (after CPU-initialization).
• The Activity LED before initialization of serial communication interface (DACI).
• The Clean LED after PROM checksum test.
• The Fault LED after the CPU and SRAM Tests
After all LEDs are lit there is no controlled stop, and if the next LED-phase (flashing Ready LED) never
appears, the system has crashed somewhere in the remaining part of the POST/PUI Part1. All LEDs are steady
on for approximately 2 seconds.
NOTE 3:
• The Clean LED steady ON indicates that a head cleaning operation is recommended (the Drive is still fully
operational with this LED steady ON) the LED is triggered after 100 hours of tape running time has elapsed,
if the Media Management Algorithm has detected severely degraded write performance, or if a hard
read/write error has occurred. The LED is not turned off by a power cycle. The LED is reset when cleaning
has completed successfully. The Clean LED is also turned on during Head Brush operaion (no sticky).
NOTE 4:
• When a diagnostic activity leads to media operations (load/eject, read/write etc.) the LED behavior changes
to a behaviour that corresponds to this kind of operation in a normal activity, but with Ready LED still
flashing.
NOTE 5:
• The Fault LED will flash to indicate an unrecoverable error. An unrecoverable error is an error condition that
results in the drive not being able to function unless initiator, operator, or service intervention is applied. An
unrecoverable drive failure is usually the result of a hardware error condition. One of the following actions
will be needed to clear the flashing Fault LED:
• Hard SCSI Reset
• Cartridge Emergency Eject
• Power Cycle
• Retry Firmware Download
An unrecoverable cartridge (media) failure is usually the result of a defective cartridge, media, or cartridge tate
and will require the drive to eject the cartridge (if possible) to clear the flashing LED.
NOTE 6:
• Firmware download failed and the drive is not functional. The drive boot code is in control and the firmware
download should be retried. The drive can be identified via an INQUIRY command and is thereby bootable
while in this state.
NOTE 7:
• The Fault LED will be on solid to indicate an over temperature (tape temperature > 47°C). If a tape is present
it will be ejected. The LED will remain on until one of the following conditions are met:
• The drive temperature goes below the preset maximum, and a new data or leaning cartridge is inserted
• The drive temperature goes below the preset maximum, and the tape drive is power cycled.