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Library Controls/Indicators
When a T9840 Tape Drive is attached to the SL3000 or SL8500 Modular Library
System, you cannot access the drive operator panel on the front of the drive without
opening the library door. The drive tray rear panel does provide some indicators and
an Ethernet port.
SL8500/T9x40 Drive Tray
FIGURE 2-4
SL8500/T9x40 drive tray.
• The power (PWR) switch is a momentary push-switch that manually changes the
state of the internal power supply PWA.
• The green PWR LED indicates the power state of the tray:
Not lit: Power is not on, nor is 48 Vdc input power applied to the tray.
Blinking: Power is not on, but 48 Vdc input power is applied to the tray.
Steady: Power is on, and power supply output voltages are normal.
• The red FAULT LED indicates anomalies within either the internal power supply
PWA or with the drive tray fan assembly.
Notes:
• Library firmware controls the drive tray power and indicators.
• The red FAULT LED does not indicate drive-related anomalies.
• Pressing the SL8500 drive tray PWR switch while the tray is powered does not
FIGURE 2-4 SL8500/T9840 Drive Tray Rear Panel
December 2012
illustrates the power switch and indicators on the rear panel of the
cause an interrupt signal to the library firmware. Wait at least 10-seconds
before you press the PWR switch to manually power-on the drive. Otherwise,
the library's drive audit will be corrupted. When the red FAULT LED comes on
(after power-off), it is safe to re-push the PWR switch to reapply power to the
drive tray.
Library Controls/Indicators
Operator Controls 37
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