SE Infrastructure V6.4 (en)

ID	Identification (ID) button Lights up (blue) on the front and on the rear of the MU when the ID button is pressed. The two ID indicators are synchronized.
	On/Off button When the MU is switched off, it is switched on again by pressing the On/Off button once. When the MU is in operation, it is switched off by pressing the On/Off button once. CAUTION! Possible loss of data! The On/Off switch does not disconnect the server from the voltage grid. To disconnect from the mains completely, remove the power plugs.
RST or RESET	Reset button Pressing the Reset button reboots the MU. CAUTION! Possible loss of data!
NMI	NMI button CAUTION! Do not press! Possible loss of data! The NMI button may only be used by Customer Support.

	Power-on indicator (three colors)
	Lights up orange when the MU is switched off but line voltage is present. After the power cables have been connected, it takes about 60 seconds until the MU is in standby mode. Lights up yellow during power up delay. If the MU is switched off and then immediately switched on again, it is only restarted after a power up delay. This prevents a current overload, for example. Lights up green when the MU is switched on. Flashes green when the MU has been switched on and is in standby mode or in sleep mode.
	Hard disk activity indicator (green) Flashes green when an internal hard disk drive is being accessed.
CSS	CSS and Global error indicators (yellow/orange)
	Generally, the states of these indicators have the following meanings: Do not light up when the MU is OK. If the event is still acute after a power failure, the indicator is activated after the restart. Light up when a prefailure event was detected. The indicator also lights up in standby mode. Flash when an error was detected. The indicator also flashes in standby mode. Irrespective of the color, when an indicator lights up or flashes this indicates an error event. Please notify Customer Support when this happens.
ID	ID indicator (blue) Lights up blue when MU has been selected by pressing the ID button. To deactivate, press the button again.

Lights up green when the storage medium is accessed. See also figure 16/17.

Figure 19: Front - Detailed view: Indicators on a hard disk module

1

HDD BUSY (green)

2

HDD FAULT (orange) (in conjunction with a RAID controller)

Does not light up: no HDD error
Lights up: HDD Faulty or Rebuild Stopped (drive defective, needs replacing, a rebuild process was stopped or the HDD module is not correctly inserted)
Slow flashing: HDD Rebuild (the data is being restored after changing a hard disk drive)
Fast flashing: HDD Identify
Four fast flashes/pause: HDD Predicted Fault
Two fast flashes/pause: HDD Hot Spare (The corresponding drive has failed).

Controls