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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 Data Systems Support Center to determine whether your MFB
can be replaced as a FRU.
Some components are also hot-swappable. See
on page 61
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
81
for details.
The HNAS 3080 and 3090 models includes the following hot-swappable
components:
• HDDs
• PSUs
• NVRAM battery backup packs
• Fan assemblies
Hitachi NAS Platform 3080/3090 G2 Hardware Reference Guide
for details.
Rebooting or shutting down a server on page
Replacing server components
Hot-swappable components
61
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