Dell Precision T5400 (Late 2007) - Manual (Page 207)

Adding and Replacing Parts 207
About the Metal Shields Present in Some Drive Configurations
In certain computer configurations, metal shields are present in the drive bays
of your computer. If metal shields are present in your computer configuration,
they are essential and must be installed in the appropriate bays at all times.
NOTICE: If metal shields are present in your computer configuration, they must be
installed at all times while your computer is in use or your computer may not
function properly.
1 upper 5.25-inch drive bay (holds an
optical drive)
2 lower 5.25-inch drive bay (holds
optional optical drive or SATA hard
drive)
3 rotatable hard-drive carrier (holds two
SAS or SATA drives)
4 FlexBay (holds optional floppy drive or
Media Card Reader)
1
2
3
4