Sun Microsystems Sun Enterprise 220R, Руководство пользователя

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Chapter 4 Hardware Configuration 63
Status LEDs
The system provides easily accessible light-emitting diode (LED) indicators on the
system 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 “About the Status and Control
Panel” on page 7. Disk drive and power supply LEDs are described in “Error
Indications” on page 138.
Hot-Pluggable Disk Drives
The hot-plug feature of the system’s internal disk drives permits the removal and
installation of drives while the system is operational. All drives are easily accessed
from the front of the system. Hot-plug technology significantly increases the
system’s serviceability and availability, by providing the ability to:
■
Increase storage capacity dynamically to handle larger work loads and improve
system performance
■
Replace disk drives without service disruption
For more information about hot-pluggable disk drives, see “About Internal Disk
Drives” on page 74 and “About Disk Array Configurations and Concepts” on
page 70.
Support for RAID 0, RAID 1, RAID 0 + 1,
and RAID 5 Disk Configurations
The Solstice DiskSuite software designed for use with the system provides the ability
to configure system disk storage in a variety of different RAID levels. You choose the
appropriate RAID configuration based on the price, performance, reliability, and
availability goals for your system.
RAID 0 (striping), RAID 1 (mirroring), RAID 0+1 (striping plus mirroring—
sometimes called RAID 10), and RAID 5 configurations (striping with interleaved
parity) can all be implemented using Solstice DiskSuite. You can also configure one
or more drives to serve as a hot spare to fill in automatically for a defective drive in
the event of a disk failure.
For more information about RAID configurations, see “About Disk Array
Configurations and Concepts” on page 70.