Dell Precision D490 Quick Reference Manual page 16

1-3 5.25-inch drive bays
4 5.25-inch drive bay with
special 3.5-inch drive
panel plate
5 hard-drive activity light
6 IEEE 1394 connector
16
Quick Reference Guide
Can hold a CD/DVD drive, or a Media Card Reader, floppy drive, or SATA hard
drive in a 5.25-inch drive bay carrier.
NOTE:
The drive carriers are only for use in the 5.25-inch drive bays. The
floppy-drive/ Media Card Reader and hard-drive carriers are not interchangeable.
Can hold a CD/DVD drive, or a Media Card Reader, floppy drive, or SATA hard
drive in a 5.25-inch drive bay carrier. The drive-panel plate shown here is only for
use with a floppy drive or Media Card Reader; it can be installed in front of any of
the four 5.25-inch drive bays. For more information, see your User's Guide.
NOTE:
The drive carriers are only for use in the 5.25-inch drive bays. The floppy drive/
Media Card Reader and hard drive carriers are not interchangeable.
The hard drive light is on when the computer reads data from or writes data to the
hard drive. The light might also be on when a device such as your CD player is
operating.
Use the IEEE 1394 connector for high-speed data devices such as digital video
cameras and external storage devices.