If the lights are correct, go to "Appendix A. Operating with RISC Systems" on page 27
which gives information about how to configure your 2104 to the using system, what
service aids are available, and how to collect statistics during the operation of your
2104.
If the 2104 Check light 2 is ON, there is a fault with your 2104 disk enclosure. Refer
to the IBM Expandable Storage Plus: 2104 Service Guide, GY33-0194, for help in
identifying the cause of this fault.
26
IBM Expandable Storage Plus: 2104 Model DL1 Installation Guide