PowerVault ML6000 Maintenance Guide 427
Interpreting LEDs
Light emitting diodes (LEDs) provide a visual indication about the status of certain library components. LEDs
can sometimes communicate that a problem exists when RAS tickets cannot. For example, an LED can
indicate a firmware problem that prohibits the library from generating RAS tickets.
The following components of the library have LEDs:
• Library Control Blade
• FC I/O Blades
• FC I/O Fan Blades
• Tape drives
• Power supplies
Some of these components may also include a fiber port link LED.
Blade Status LEDs
Library control blade (LCB) and FC I/O blade LEDs indicate status by the rate at which they blink. The color
of the LED identifies the area of the component being reported.
Figure 28
shows the location of the blade LEDs. Table 11 describes how to interpret the current status of
the blade.
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