Dell PowerVault 725N (Rackmount NAS Appliance) - Manual (Page 28)

2. Remove the drive carrier and install it in another drive bay. See " Removing and Installing a Hard Drive " for information about installing hard drives.
3. If the hard drive is working properly in the new drive bay, the backplane board has a defective connector and must be replaced. See " Getting Help ."
4. If the hard drive is not working properly in the new drive bay, run the hard drive diagnostics tests. See "Running Hard-Drive Diagnostics Tests."
5. If the problem is not resolved, see " Getting Help ."
Inside the System
In Figure 4 -3 , the system cover and front panel are removed to provide an interior view of the system.
Figure 4-3. Inside the System
The system board holds the system's control circuitry and other electronic components. Several hardware options such as the processors and memory are
installed directly on the system board. The system board can accommodate two PCI expansion cards.
The hard drive bays provide space for up to four IDE hot-plug drives. Power is supplied to the backplane board, the system board, and internal peripherals
through a power supply.
Troubleshooting a Wet System
Problem
l Liquid spills
l Splashes
l Excessive humidity
Action
1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2. Remove the system cover. See " Removing and Replacing the System Cover ."
3. Remove any expansion cards, if installed. See " Adding or Removing an Expansion Card ."
4. Allow the system to dry thoroughly for at least 24 hours.
5. Connect a keyboard, mouse, and monitor to the NAS system.
6. Replace the system cover, reconnect the system to the electrical outlet, and turn on the system.
If the system does not start up properly, see " Getting Help ."
7. If the system starts up normally, shut down the system and reinstall the expansion cards you removed in step 3.
8. Replace the system cover, reconnect the system to the electrical outlet, and turn on the system.
9. Run the system board tests in the System Diagnostics to confirm that the system works properly. See " Running System Diagnostics ."
If the tests did not complete successfully, see " Getting Help ."
Troubleshooting a Damaged System
NOTE: When you turn on the system, press the power button for less than two seconds. If you press the power button for longer than 3 seconds,
the NAS system shuts down and automatically rebuilds its RAID arrays, which could impact system performance for several hours.