Dell PowerVault 221S (SCSI) - Manual (Page 2)

Introduction: Dell PowerVault 220S and 221S Systems Installation and Troubleshooting Guide
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Introduction
Dell™ PowerVault™ 220S and 221S Systems Installation and Troubleshooting Guide
Front-Panel Features and Indicators
Back-Panel Features and Indicators
Audible Alarm
Dell™ PowerVault™ 220S and 221S systems are reliable, flexible, external SCSI expansion enclosures designed to support
multiple Dell storage environments and RAID configurations. Each system offers maximized drive-spindle count, hot-plug hard
drives, optional redundant power supplies, redundant cooling modules, rackmount capability, systems management features,
and a modular design for easy upgrades. Most major components, including hard drives and power supply/cooling modules
are hot-pluggable and can be removed and replaced easily. The enclosure management module (EMM), split-bus module, and
SCSI terminator card are "warm-pluggable." This means they can be removed or inserted while the power is on, but all I/O
activity has ceased. This section identifies front- and back-panel components and LED indicators. For more information on
system features and specifications, see your User's Guide.
Front-Panel Features and Indicators
Figure 1-1 shows the front-view orientation of both systems.
Figure 1-1. System Orientation
Figure 1-2 illustrates LED indicators and components on the system's front panel. Table 1-1 lists conditions indicated by each
LED.
Figure 1-2. Front-Panel Features