Replacing an FPGA board as a FRU
Typically, when an FPGA board fails, the whole Hitachi NAS Platform server is replaced. However, in some cases with the HNAS 3080 and 3090 platform models, an FPGA board may be replaced as a field replaceable unit (FRU).
An FPGA board is also known as the main FPGA board (MFB).
Contact Hitachi Vantara Support Connect to determine whether your FPGA can be replaced as a FRU.
Requirements for Replacing FPGA board
MFB replacement may not be performed while the server is operation; the server must be shut down and removed from the rack before the replacement procedure can be started. After the MFB has been replaced, the server can be put back into the rack, reattached, and restarted.
Tools and Requirements
- #1 Phillips screwdriver.
- Replacement MFB.
- ESD wrist strap.
Replacing the FPGA board
MFB replacement may not be performed while the server is operation; the server must be shut down and removed from the rack before the replacement procedure can be started. After the MFB has been replaced, the server can be put back into the rack, reattached, and restarted.
Procedure
Using NAS Manager, log in and select Reboot/Shutdown from the Server Settings page to display the Restart, Reboot and Shutdown page. Note that the page has different options depending on the configuration of your system.
Click Shutdown to stop file serving EVSs on the server, and then shut down and power off the server.
Remove the fascia. See Bezel removal.
Disconnect all power and networking cables from the server.
Completely remove the server from the rack.
Use caution when removing the server as the current rails do not have "stops." Two people should be available to unmount and move the unit.
Place the server on a level work surface such as a table or cart.
Using the #1 Phillips screwdriver, remove and set aside the two (2) MFB retaining screws.
Without lifting the MFB, slide the MFB towards the rear of the server, as shown in the next illustration.
The MFB should slide approximately 2 to 2.5 inches (5 to 7 centimeters), creating a gap between the MFB and the top front of the chassis.
Looking into the gap, you will see six (6) cables connecting the MFB to the rest of the server. A cable tie is used to secure each cable.
Disengage the cable ties from the shell of the MFB by squeezing the tabs at the base of the cable ties.
Once all cable ties have been disconnected, disconnect the cable connectors from the mating MFB connectors by pressing the connector retainer tabs.
Once all internal cables have been disconnected, remove the MFB. Turn it upside down and place it on a flat work surface.
Open the box that contains the replacement MFB module. Remove the module and orient it so that the module cover labels face down. This will protect the sheet metal tabs on the bottom side of the module (see next illustration).
Place the labeled cover down on a flat work surface and remove the module from the ESD shielding bag.
MFBs may be shipped with a metal shim under the retaining clip. Remove the metal shim before proceeding to the next step.
Replacement modules may ship with a metal shim under the sheet metal retainer tabs. If so, remove the tape and slide the shim out from under the tabs.
Lift the module from the work surface, turn it over so the labels face up, and place it into the server chassis. Slide it fully to the rear to expose mating cables.
Connect the cables, ensuring that each is securely fastened.
Engage the cable ties.
Push the MFB module forward until the front lip slides under the front half of the server cover. Apply adequate pressure to force the woven EMI gasket under the front cover and to align the MFB front retainer holes with the mating threads on the base server sheet metal
Secure the MFB to the chassis base using the screws that were previously removed. Carefully secure the screws using the #1 Phillips driver. Avoid over-tightening the fasteners.
Replace the server in the rack, and reconnect the network and power cables. Refer to the System Installation Guide for more information about racking and cabling the server.
Transfer the SFPs and XFPs from the old MFB to the replacement MFB.
After the replacement, you can power up the server and check the dblog for the message:
MMB1 Warning: Hardware MFB1 has been replaced (B1004002 -> B0916023)Place the replaced module in the shielding bag and insert it in the original packaging for return to the supplier.