Hitachi 3080 G2 Hardware Reference Manual page 43

• When a new server is installed and powered on, the battery pack is not
fully charged (it will not be at 100% capacity). After being powered on, the
server performs tests and starts a conditioning cycle, which may take up
to 24 hours to complete. During the conditioning cycle, the full NVRAM
content backup protection time of 72 hours cannot be guaranteed.
• A replacement battery pack may not be fully charged (it may not be at
100% capacity) when it is installed. After a new battery pack is installed,
the server performs tests and starts a conditioning cycle, which may take
up to 24 hours. During the conditioning cycle, the full NVRAM content
backup protection time of 72 hours cannot be guaranteed.
• If a server is left powered off, the battery will discharge slowly. This means
that, when the server is powered up, the battery will take up to a certain
number of hours to reach full capacity and the time depends upon whether
a conditioning cycle is started. The scenarios are:
○ 24 hours if a conditioning cycle is started
○ 3 hours if a conditioning cycle is not started
During the time it takes for the battery pack to become fully charged, the
full 72 hours of NVRAM content protection cannot be guaranteed. The
actual amount of time that the NVRAM content is protected depends on
the charge level of the battery pack.
• A battery pack may become fully discharged because of improper
shutdown, a power outage that lasts longer than 72 hours, or if a server is
left unpowered for a long period of time.
If the battery pack is fully discharged:
○ The battery pack may permanently lose some long term capacity.
○ Assuming a battery conditioning cycle is not started, a fully discharged
battery pack takes up to 3 hours before it is fully charged. If a battery
conditioning cycle is started, a fully discharged battery pack takes up to
24 hours before it is fully charged.
○ A battery conditioning cycle is started if the server is powered down for
longer than three months.
• A battery pack may be stored outside of the server for up to one year
before it must be charged and/or conditioned. After one year without being
charged and possibly conditioned, the battery capacity may be
permanently reduced.
If you store battery packs for more than one year, contact your
representative to find out about conditioning your battery packs.
• When preparing a server for shipment, if the NVRAM is still being backed
up by battery (indicated by the flashing NVRAM LED), the battery can be
manually isolated using the reset button. See
50 for the location of the reset button.
When preparing a server for shipment or if it will be powered down for any
length of time, it is important that the server has been shut down correctly
before powering-off. Otherwise, if the server is improperly shut down, the
batteries supplying the NVRAM will become fully discharged. This also
Hitachi NAS Platform server components
Hitachi NAS Platform 3080/3090 G2 Hardware Reference Guide
Reset button (RST) on page
43