IBM 440 manual Light Path Diagnostics, Front panel of the xSeries

￿Two hot-swap hard disk drive bays. An optional ServeRAID adapter can be configured to form a RAID-1 disk array for the operating system.

￿The memory subsystem has a number of redundancy features, including memory mirroring, as described in 1.7, “System memory” on page 19.

The layout of the front panel of the x440, showing the location of the drive bays, power supplies and fans, is shown in Figure 1-13.

Hot-swap fans

Power-on light

Power button

Reset button

Hot swap power supplies

Hot swap drive bays

Diskette drive CD-ROM drive

Light Path Diagnostics panel (pulls out)

USB port

System-error light (amber) Information light (amber) SCSI activity light (green) Locator light (blue)

Figure 1-13 Front panel of the xSeries 440

1.10 Light Path Diagnostics

To limit the need to slide the server out of the rack to diagnose problems, a new Light Path Diagnostics panel has been added to the front of the x440. This panel can be ejected from the server to view all Light Path Diagnostics-monitored server subsystems. In the event that maintenance is then required, the customer can slide the server out from the rack and using the LEDs, find the failed or failing component.

As illustrated in Figure 1-14 on page 26, Light Path Diagnostics is able to monitor and report on the health of CPUs, main memory, hard disk drives, PCI-X and PCI slots, fans, power supplies, VRMs, and the internal system temperature.

Chapter 1. Technical description 25