Dell Precision T3400 (Late 2007) - Manual (Page 193)

Adding and Replacing Parts
193
6 Press in on the blue tabs on each side of the hard drive bracket and slide
the drive up and out of the primary or secondary hard drive bay.
1 SAS connector on SAS controller
card 2 SAS connector on SAS controller
card
3 hard drive in secondary hard
drive bay 4 hard drive in primary hard drive
bay
5 blue tabs (2 on each hard drive
bracket)
4
5
1
2
3