Infortrend S12 Series Hardware Manual page 7

ESD Precautions
 Handle the modules by their retention screws, ejector levers, or the
module's metal frame/faceplate only. Avoid touching the PCB boards or
connector pins.
 Use a grounded wrist strap and an anti-static work pad to discharge
static electricity when installing or operating the enclosure.
 Avoid dust, debris, carpets, plastic, vinyl, and styrofoam in your work
area.
 Do not remove any module or component from its anti-static bag before
installation takes place.
 Drives must not be stacked on top of each other without their protective
drive trays. Even when drives are fixed in the drive trays, contacting the
exposed PCB or rear-side interface may damage the drives.
ESD Precautions