User guide

Interpreting fibre port link LED
A fibre port link LED shows the state of the Fibre Channel link and whether the link is ready to
transmit commands.
Drive sled Fibre Channel link LED
The Fibre Channel link LED for a drive sled is located on the rear of the drive sled. Figure 27 (page
212) shows the location of the Fibre Channel link LED on the rear of the LTO drive sled.
Table 44 (page 213) describes the Fibre Channel link LED activity on the rear of the LTO drive sled.
Table 44 FC drive sled link LED states
State and explanationRepresentsLED color
• Steady on: loop initialization protocol (LIP)
has occurred (for example, Passive Mode)
• Blinks at irregular intervals: host
command/data activity is occurring
LIP and activityGreen
Online and light detectedAmber
• Steady on: the library has enabled the drive
data bus; it can detect light through a fiber
optic cable
• Blinks at regular intervals: the library has
enabled the drive data bus, but light is not
detected through the fiber optic cable
Steady off: the library has not enabled the
drive data bus or the drive brick is varied off.
No color
If the drive brick is varied off, the blue status
LED is steady on.
Interpreting MCB port LEDs
The MCB has LEDs for the Ethernet and Fibre Channel ports.
MCB Ethernet port LEDs
The LEDs on the MCB Ethernet port indicate status and activity.
Figure 28 (page 213) shows the locations and colors of the MCB Ethernet port LEDs.
Figure 28 Locations: colors of MCB Ethernet port LEDs
1. MCB Ethernet port LEDs
Table 45 (page 214) describes how to interpret the Ethernet port LED activity that you might see.
Interpreting LEDs 213