Rear of the MU

Figure 14: Management Unit (MU) - rear of an MU M3

Figure 14 shows the rear of an MU M3 with PCIe slots which are not equipped.

ID/CSS/Global error indicator

Figure 15: ID/CSS/Global error indicator (MU M3)

1	ID/CSS/Global error indicator

ID	ID indicator (blue) Lights up blue when the MU has been selected by pressing the ID button. To deactivate, press the button again. The ID indicator can also be activated via the ServerView Operations Manager and the iRMC S<n> web interface, and the status can be reported to the ServerView Operations Manager and the iRMC S<n>.
CSS	CSS and Global error indicator (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.

LAN indicators

Figure 16: LAN indicators (MU M3)

1	LAN speed	Lights up green for a LAN transfer rate of 1 Gbps. Lights up green for a LAN transfer rate of 100 Mbps. Does not light up for a LAN transfer rate of 10 Mbps.
2	LAN connection/transfer	Lights up green if a LAN connection exists. Does not light up if no LAN connection exists. Flashes green when a LAN transfer is in progress.

Indicator on hot-plug power supply unit

Figure 17: Indicator on hot-plug power supply unit

1

Flashes green when the MU is switched off, but line voltage is present (standby mode). Lights up green when the MU is switched on and functioning properly. Flashes orange when a predictable error has been detected, but the power supply unit is still running. 1) Flashes orange in the case of OCP/OVP or when the power supply unit's fan has failed.

    1)   The following events are detected as predictable errors:

• The temperature is very high.

• The power consumption is very high.

• The strength of current is very high.

• The fan speed is very low.

In each of these cases please notify Customer Support.

Assignment of the PCIe slots

The assignment of the PCIe slots differs between MU M3 and MU M4.

PCIe slot assignment on the MU M3

Figure 18: Principle of PCIe slot assignment at the rear of the device (MU M3)

The figure shows the PCIe slots of the MU M3 on an SE710. On the various model series of the SE server, the PCIe slots of an MU M3 are assigned as follows:

PCIe slot	SE710	SE310/SE320
S2	FibreChannel card	optional FibreChannel card (→ CRD)
S3	optional FibreChannel card (→ CRD)	optional FibreChannel card (→ CRD)
S4	not assigned	not assigned

Table 2: PCIe slot assignment on an MU M3

The MU M3 can be equipped with another FibreChannel card in the free PCIe slot S4. Accordingly, two more ports are available for the ROBAR connection and cluster functionality.

Figure 19: Management Unit (MU) - rear of an MU M4

No.	Function
1	Up to two hot-plug power supply units
2	PCIe slot 3
3	PCIe slot 2
4	PCIe slot 1
5	OCP module 1
6	I/O panel
7	OCP module 2 (unused)

Figure 20: Schematic view of the rear of an MU M4

Figure 21: Management Unit (MU) - rear of an MU M5

No.	Function
1	Up to two hot-plug power supply units
2	PCIe slot 3
3	PCIe slot 2
4	PCIe slot 1
5	OCP module 1
6	I/O panel
7	OCP module 2 (unused)

Figure 22: Schematic view of the rear of an MU M5