Sun Microsystems V490 manual LED Status Indicators

gain access to the disk drives, power supplies, and Fan Tray 0. If the media door is locked and the power supply access panel is in place, you will not be able to gain access to the power supplies, disk drives, and Fan Tray 0—even if the PCI access panel is unlocked.

Note – The same key operates the security lock, the system control switch (see “System Control Switch” on page 15), and the top panel lock for the PCI and CPU access panels.

The standard system is configured with two power supplies, which are accessible from the front of the system. LED indicators display power status. See “LED Status Indicators” on page 13 for additional details.

LED Status Indicators

Several LED status indicators on both the front and back panels provide general system status, alert you to system problems, and help you to determine the location of system faults.

At the top left of the system as you look at its front are three general system LEDs. Two of these LEDs, the system Fault LED and the Power/OK LED, provide a snapshot of the overall system status. The Locator LED helps you to locate a specific system quickly, even though it may be one of dozens or even scores of systems in a room. The front panel Locator LED is at the far left in the cluster. The Locator LED is lit by command from the administrator. For instructions, see “How to Operate the Locator LED” on page 168.

Other LEDs located on the front of the system work in conjunction with specific fault LED icons. For example, a fault in the disk subsystem illuminates the disk drive Fault LED in the center of the LED cluster that is next to the affected disk drive. Since all front panel status LEDs are powered by the system’s 5-volt standby power source, Fault LEDs remain lit for any fault condition that results in a system shutdown.

Locator, Fault, and Power/OK LEDs are also found at the upper-left corner of the back panel. Also located on the back panel are LEDs for the system’s two power supplies and RJ-45 Ethernet ports.

See FIGURE 2-1and FIGURE 2-3for locations of the front panel and back panel LEDs.

During system startup, LEDs are toggled on and off to verify that each one is working correctly.

The following tables list and describe the LEDs on the front panel: system LEDs, fan tray LEDs, and hard disk drive LEDs.

Chapter 2 System Overview 13