Dell Precision T7400 (Late 2007) - Manual (Page 18)

18 Quick Reference Guide
About Your Computer
Front View (Tower Orientation)
1–3 5.25-inch
drive bays Can hold a CD/DVD drive, or a media card reader, floppy
drive, or a SATA hard drive in a 5.25-inch drive bay carrier.
The hard-drive carrier is only for use in the 5.25-inch drive
bays. The floppy-drive/media card reader and hard-drive
carriers are not interchangeable.
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