Item Name Icon Description(2) • Front-end ports: Fibre Channel ports, iSCSI ports, or SASports• MGMT port: Embedded Ethernet/iSCSI port that is typicallyused for system management• REPL port: Embedded iSCSI port that is typically used forreplication to another Storage Center• Serial port: Used for initial configuration and supportfunctions4 Cooling fan faultindicator (2)• Off: Normal operation• Steady amber: Fan fault or the storage system is having aproblem communicating with the PSU• Blinking amber: PSU is in programming mode5 AC power faultindicator (2)• Off: Normal operation• Steady Amber: PSU has been removed or the storagesystem is having a problem communicating with the PSU• Blinking amber: PSU is in programming mode6 AC power statusindicator (2)• Off: AC power is off, the power is on but the PSU is not inthe storage system, or a hardware fault is possible• Steady green: AC power is on• Blinking green: AC power is on and the PSU is in standbymode7 DC power faultindicator (2)• Off: Normal operation• Steady amber: PSU has been removed, a DC or otherhardware fault has occurred, or the storage system ishaving a problem communicating with the PSU• Blinking amber: PSU is in programming mode8 Power socket (2) — Accepts a standard computer power cord.9 Power switch (2) — Controls power for the storage system. Each PSU has oneswitch.18 About the SC4020 Storage System
