Dell PowerEdge HX574 Hardware Owner's Manual page 132

support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that came with the
product.
1 Turn off the system and attached peripherals, and disconnect the system
from the electrical outlet.
2 Open the system. See "Opening the System" on page 67.
NOTICE:
SAS drives and optical drive carrier from the system before removing the
backplane. You must note the number of each hard drive and temporarily label them
before removal so that you can replace them in the same locations.
3 To remove the optical drive carrier, pull the release latch forward, then
slide the carrier out of the chassis. See Figure 3-23.
4 Remove fans 1 and 3 or 2 and 4 (depending on which fan interposer board
is being replaced). See "Removing a Cooling Fan" on page 69.
5 Remove the SAS backplane (systems with 3.5" hard drives) or peripheral
interposer board (systems with 2.5" hard drives). See "SAS Backplane" on
page 124 or "Peripheral Interposer Board" on page 128.
6 Remove the two screws and remove the fan interposer board. See
Figure 3-32.
132
Installing System Components
To prevent damage to the drives and backplane, you must remove the