User guide

C–18 Rack information
Hitachi Unified Storage VM Block Module Hardware User Guide
Placing components in the rack
If mounting more than one HUS VM Drive Box, spread the storage system
ratio evenly and to avoid a top-heavy installation. The following illustration
shows an example of such a ratio.
Working with racks or components in the rack
Observe the following guidelines when working with racks or components in
a rack.
• For all procedures, follow the given methods and sequence of steps.
• Use tools and parts for maintenance specified in the manual; otherwise,
personal injury or damage of the rack, as well as deterioration of the
product’s quality, may result.
• Use only the special tools and instruments specified in this manual or
use appropriate commercially available tools and instruments.
• Keep the maintenance area clean.
• Put away parts, materials, or tools when not in use.
• Wear eye protection where liquid may splash or objects may fly about.
• When lifting anything heavy, lift it using your legs with your back kept
erect to prevent injury to your back or spine. When lifting, use a proper
lifting tool, or ask somebody to assist you.
• Before finishing your work, be sure the rack and any products mounted
in it are returned to their original state. Be sure all parts removed during
maintenance have been installed back in their original positions in the
rack or products mounted in it.
• Be sure that no tool or foreign material is left in the rack.
• Do not repair, remodel, or disassemble the rack and related
components. Such actions can injure you and damage the equipment.
Air vents and airflow
Observe the following air vent and airflow guidelines.
• Be sure the air vents on the rack are free of obstruction and are
inspected periodically. To prevent electric shock or fire, do not place
metallic material such as paper clips or any combustible material such
as paper into or near the air vents.
• The direction of airflow is front/input to rear/output on the HUS VM base
and drive boxes.
• Do not place metallic material, such as paper clips, or any combustible
material, such as paper, into or near the air vents. This may result in
electric shock or fire.
• Air flows through the rack from front to back. An optional rear-mounted
fan tray is available to further maintain the airflow.
Smallest 1 Full Rack Spanning Racks