HP StorageWorks 2405 - Disk System User Manual page 46

46 Installation
8 Place the storage device on the rails and slide into the cabinet until the
retention bracket comes into contact with the rack column (see Figure 20).
WARNING An empty disk system weighs approximately 54 pounds (24.5 kg).
To avoid personal injury, it is recommended that two people install
the storage device in the rack.
9 Insert and tighten the storage device retention (M5) screws through the
retention bracket (see Figure 20).