Figure 6. System LEDs on the left side of the front of the enclosureOn the rear of the enclosure, each I/O module provides status LEDs, as shown in Figure 7.Figure 7. I/O module LEDsIn addition, the SA120 offers LEDs on the following components:On each drive: Drive status and drive error LEDsOn each power supply: Status LEDOn each system fan module: Status LEDAs shown in Figure 7, each I/O module has an RJ11 port for firmware upgrades. A 3 m (9 ft) RS232-to-RJ11serial cable is provided with the SA120. Firmware upgrades can be completed by using one of the followingmethods:The provided serial cable and an SSH serial console client.ThinkServer Storage Array Utility program, which is available at this website:http://support.lenovo.com/en/downloads/ds040947.Tower conversion kitLenovo ThinkServer SA120 Storage Array 13