Sun Microsystems 280R manual Easily Accessible Status LEDs, Hot-Pluggable Disk Drives

The system reports and logs correctable ECC errors. A correctable ECC error is any single-bit error in a 64-bit field. Such errors are corrected as soon as they are detected. The ECC implementation can also detect double-bit, triple-bit, and quadruple-bit errors in the same 64-bit field that occur in the same nibble (4 bits).

In addition to providing ECC protection for data, the system offers parity protection on all system address buses. Parity protection is also used on the Peripheral Component Interconnect (PCI), Extended PCI, Fibre Channel-Arbitrated Loop (FC- AL), and Small Computer System Interconnect (SCSI)) buses, and in the UltraSPARC CPU’s internal and external cache. In addition there is internal error detection and reporting on all system application specific integrated circuits (ASICs).

Easily Accessible Status LEDs

The system provides easily accessible light-emitting diode (LED) indicators on the front panel, internal disk bays, and power supplies to provide a visual indication of system and component status. These status LEDs eliminate guesswork and simplify problem diagnosis for enhanced serviceability.

The system status LEDs are described in the section “System LED Indicators” on page 10.

Hot-Pluggable Disk Drives

When configured with hot-plugsoftware (for example, the Sun Solstice DiskSuite or VERITAS software; see “About Storage Management Tools” on page 76), the system’s internal disk drives can be removed and replaced while the system is operational. You can easily access the internal drives from the front of the system.

The same hot-plug technology is also supported via PCI FC-AL, or UltraSCSI adapter cards using external storage. With both internal and external technologies installed, hot-plug technology significantly increases the system’s serviceability and availability, by providing the ability to:

■Replace disk drives without service disruption

■Increase storage capacity dynamically to handle larger work loads and improve system performance

For more information about hot-pluggable disk drives, see “About Internal Disk Drives” on page 91 and “About Disk Array Configurations and Concepts” on page 87.

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