IBM AA-RWF3A-TE - Manual (Page 135)

Type Requirements
4/64 SAN Switch:
Cabinet space of 2U in a EIA 19 in cabinet.
All equipment in the cabinet grounded through a reliable branch circuit connection.
Additional weight of the switch must not exceed the cabinet’s weight limit.
Cabinet must be secured to ensure stability in case of unexpected movement, such
as an earthquake.
SAN Switch installation guide 135