Sun Enterprise 6500/5500/4500 Systems Reference Manual

Board Hot-Plug Procedures

The CPU/Memory+ board and the I/O+ board are hot-pluggable under certain conditions. If the operating system detects a hardware failure in the board, the system powers down the corresponding board slot and turns off the left green status LED on the board. (See Table 9-2 for LED codes.)

When the left green LED is off, it is safe to remove the board even though the system continues running.