HP StoreOnce 4900 Backup Installation And Configuration Manual page 110

Figure 30 10GbE card LEDs
1. Link
2. Activity
1 10 Understanding LEDs
Off: No link to the adapter is established. The adapter is
not receiving power or the cable connection is faulty
On (yellow): Link to the adapter is established. The adapter
is receiving power and the cable connection is good.
Flashing green: Ongoing network data activity. The adapter
is sending or receiving network data at up to 10 Gb/s
Off: No network data activity or no connection.