Fujitsu PRIMERGY SX910 S1 Operating Manual page 38

Control and display elements Installation and operation
ID card
You can pull out the ID card (see figure 12 on page 37 above) as far as it will go
and push it back in again.
The ID card contains various system information, such as the product name,
serial number, order number, MAC addresses and DNS name (in the Japanese
market, only the product name and the serial number).
38 Operating Manual
SX910 S1