Dell Precision T3400 (Late 2007) - Manual (Page 186)

186
Adding and Replacing Parts
1 upper 5.25-inch drive bay
(supports an optical drive) 2 lower 5.25-inch drive bay
(supports an optical drive or an
additional SATA hard drive)
3* additional fan (not shown) 4 secondary hard drive bay
5 primary hard drive bay 6 lower 3.5-inch drive bay
(supports a floppy drive or a
Media Card Reader)
7 upper 3.5-inch drive bay
(supports a floppy drive, a Media
Card Reader, or an additional
SATA or SAS hard drive)
1
6
4
2
7
5
3*
*an additional fan may be located here in computers with configurations with
three SAS hard drives