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Dell SAN Foundations Online Training Course
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Index
Course Overview
SAN Introduction
SAN Architecture
Interface
Fibre Channel Concepts
Topologies

Hardware Components
Host Bus Adapters
Media/Connectors
Switches
GBICS
Storage Devices
Bridges
Tape Devices
Rack Mounting
Environmental Concerns

Software Components
LUN Masking
SAN Management
Data Management
Clustering

Section Review
SAN Implementation
Course Review
Course Feedback
Contact Dell

Storage Area Network: Architecture

Rack-Mounting Components

In order to minimize the amount of space required to house a SAN, Dell provides rack systems in which users can store servers, storage, and peripherals.

Racks are categorized based on their size in industry standard units, expressed as "U" (1.75 inches/44.45 mm in height).

For housing rack components, Dell's freestanding rack systems are available in 24U and 42U sizes.

  This image shows a racked SAN

For additional information on Dell's free standing rack mounting systems, please consult Dell's PowerEdge Rack System brochure. You will need Adobe Acrobat Reader to open the brochure.
Measuring a U on a Dell rack
On Dell racks, a U is the distance from one thin separator on the equipment mounting flange to the next, as shown at right.

Dell's PowerEdge servers, PowerVault storage devices, and PowerConnect switches all come in rack-mountable models; these models are categorized by the number of rack units required to house them. So, a "1U" Dell PowerEdge server would fill one of the rack's units.

   This image shows the measurement that consitutes '1U'

The Rack Advisor

Dell's Rack Advisor utility allows you to examine the physical configuration plan of your SAN by comparing the rack's available space against the amount of space required by the desired number of devices. Select a rack type, then click on one of the component tabs (graphic, right).

You can drag-and-drop various component types into the rack to see if the configuration will work. When the rack is full, the Advisor will produce a message indicating that no additional devices can be added.

   This image shows the Dell Rack Advisor interface

The Rack Advisor can also be used to test settings such as whether or not the rack is set up to allow for adequate airflow or power input.

The tool also allows for peripherals (such as keyboards) and non-Dell devices to be added to the configuration.

The latest version of the Dell Rack Advisor is available for download from http://support.dell.com.
Dell Racking Guidelines
These guidelines should be followed in order to successfully mount components in a Dell rack. Following these guidelines will help ensure your safety, increase the ease of the installation process, and protect the SAN components from damage.

  • Stabilize the rack before adding components.

  • Build the rack from the bottom up.

  • Install PDUs (Power Distribution Units) and power strips before installing servers and storage components.

  • Loosen preassembled slide assembling mounting screws to allow for the best possible fit.

  • Tighten preassembled slide assembly mounting screws after installing components.

  • If possible, remove the rack's sides. This allows for easier access to components.

  • Connect cables to components only after the component has been mounted.

  • Attach and route data cables before connecting power cables.

  • If possible, route power cables away from data cables.

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