HP EML E-series Tape Libraries - Manual (Page 45)

LTO tape drives
Figure 41 Indicator on an LTO2 or LTO3 tape drive
Table 12 Indicator on an LTO2 or LTO3 tape drive
Function Control/indicator Index No.
When lit (yellow), indicates that initialization is in progress,
the library robotics controller software has detected a failure FAULT LED 1
that requires the replacement of the tape drive assembly,
or a hot swap can occur.
When not lit, indicates normal operation.
Figure 42 Indicators on an LTO4 tape drive
Table 13 Indicators on an LTO4 tape drive
Function Control/indicator Index No.
When lit (yellow), indicates that initialization is in progress,
the library robotics controller software has detected a failure FAULT 1
that requires the replacement of the tape drive assembly,
or a hot swap can occur.
When not lit, indicates normal operation.
Beacon. ID 2
When lit (green), indicates link activity on FC port A. FC A 3
When lit (green), indicates link activity on FC port B. FC B 4
Controls and indicators 45