User guide

C–16 Rack information
Hitachi Unified Storage VM Block Module Hardware User Guide
• Be sure the front anti-tip stabilizing plate is installed before extending
any equipment to the front. See Stabilizing the rack on page C-30 and
Installing side stabilizer plates.
Figure C-18: Installing and Uninstalling the Anti-Tip Stabilizing Plate on
page C-33 shows an example of how to install the side stabilizer plates.
See the example of Installing the Side Stabilizer Plates.
• Install anti-tip stabilizing plates at the bottom left and right sides to
increases rack stability.
• If extending equipment out of the rack, extend only one tray at a time.
Extending two or more trays at a time may cause the rack to become
unstable and possibly fall.
• Always use common sense and safety precautions.
Component weight and location
The Hitachi racks allow many components to be mounted. The weight and
location of the components in the rack must be planned to ensure that the
center of mass is as much as possible below the mid-point of the rack. To
reduce the risk of danger to persons or equipment, follow the safety
guidelines and stabilize the rack as described in this manual.
Start mounting hardware from the bottom of the rack. If the hardware is
mounted at the top of the rack, the rack may become unstable and fall. The
location of the HUS VM controller and drive boxes, along with the layout of
your equipment rack and its wiring, are extremely important for proper
system operation. Equipment placed too closely together can cause
inadequate ventilation and inaccessible panels. These can cause system
malfunctions and shutdowns, and can make system maintenance difficult.
• Fully configured HUS VM base and drive boxes can weigh hundreds of
pounds (see Floor load ratings on page 3-6). Ensure that all surfaces
over which this system will travel can withstand this load.
• Enclosed racks must have adequate ventilation. Be sure not to block the
air vents on the front and back of the HUS VM base and drive boxes. The
direction of airflow is front/input to rear/output.
• When mounting a chassis in an open rack, ensure that the rack frame
does not block the airflow from either the intake or the exhaust ports. If
the chassis is installed on slides, check the position of the chassis when
it is seated all the way in the rack.
Note: For single (stand-alone) racks, be sure the rack is level and has
been stabilized before installing components. If an unstable rack is loaded
with components, it may become unbalanced and tip over.
Caution: If a controller or drive box falls, it can cause personal injury.
When lifting a unit, be sure you have at least two people, and up to 4 people
and a mechanical lift device, depending on the weight of the storage unit
being installed. Controller and drive box positioning, fastening, or other
handling should be performed very carefully.