Dr4000 System Nvram - Dell DR4000 Administrator's Manual

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2 Allow the DR4000 system to fully complete its power-down process (when
the power supply status indicator is unlit).
3 Disconnect the DR4000 system power cables from the electrical power
outlet.
4 Ensure to wait an additional period of time (up to 10 minutes), and/or
verify that all of the green and amber NVRAM LEDs on the rear panel of
the system chassis are unlit.
NOTE:
If you do not allow the NVRAM super capacitor sufficient time to discharge,
the NVRAM status will report DATA LOSS when the DR4000 system is subsequently
powered up.
5 Unlatch the latch release lock and slide the DR4000 system cover back and
away to gain entry to the appliance internal components.
To gain entry to the DR4000 system, remove the cover. For more
information, see the procedures in the
Manual.
6 Remove and replace the system hardware components as needed.
7 Replace the cover, reconnect the system power cables to the electrical
power outlet.
8 Power On the DR4000 system by pressing the power-on indicator/power
button.

DR4000 System NVRAM

NVRAM is a field replaceable unit (FRU) in the DR4000 system, which
consists of 8 GB of memory that is divided into four different partitions. The
NVRAM double data rate (DDR) memory is backed by a super capacitor,
which requires 96% of its charge (4.6V/5.0V) to perform its role.
The super capacitor is responsible for moving DDR contents to the solid-state
drive (SSD) during a power loss. The data transfer process requires it to
maintain power for 3 minutes of operation (normally, it takes approximately
one minute).
If there is a problem in backing up data into the SSD, a subsequent system
reboot detects this issue. NVRAM can experience backup failure when the
following occurs:
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Using the DR4000 System Support Options
Dell DR4000 System Owner's