Hitachi Compute Blade 2000 User Manual page 92

 I/O adapter for I/O slot expansion unit
B
C
A Attention button (ATN)
Starts the hot insertion and hot removal of the I/O adapter.
B POWER LED (PWR)
Blinks green when power to the I/O adapter is turning on or off.
C Attention LED (ATN)
Blinks orange when the I/O adapter is located.
A
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