HP ProLiant ML370 Generation 4 - Installing Hot-Plug Fans

78 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide
7. Reinstall the redundant fan cage retaining bracket.
Installing hot-plug fans
1. After installing the redundant fan cage, insert two of the hot-plug fans into
the redundant fan cage and one fan into the redundant slot on the fan cage
along the center wall.