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Chapter 6: Replacing server components
This section describes which components are field replaceable units (FRUs) and how to
replace those components. The section also describes which components are hot-
swappable.
Field-replaceable units
Some components are field-replaceable units (FRUs).
Important: The FRUs can only be replaced by certified engineers. These
components are not customer replaceable units (CRUs).
FRUs include the following components:
Hitachi NAS Platform or Hitachi Unified Storage File Module servers
■
Bezels
■
Hard disk drives (HDDs)
■
Power supply unit (PSUs)
■
NVRAM battery backup packs
■
Fan assemblies
■
Note: Main Motherboards (MMBs) and Main FPGA Boards (MFBs) are pre-
installed boards that perform functions essential to the integrity of the
server. If there is an issue with the MMB, or the MFB (typically), you must
return the server for repair. MMBs are not FRUs, and, typically, MFBs are also
not FRUs. However, an MFB may be replaced under certain specific
circumstances. Contact Hitachi Support Connect to determine whether your
MFB can be replaced as a FRU.
Some components are also hot-swappable. See
page 51)
for details.
Hot-swappable components
Some components are hot-swappable. Such components can be changed without
shutting down the server.
Before replacing a component that is not hot-swappable, you must shut down and power
off the server. See
Hitachi NAS Platform 3080 and 3090 G2 Hardware Reference
Rebooting or shutting down a server (on page 69)
Chapter 6: Replacing server components
Hot-swappable components (on
for details.
51
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