Nvram Backup Battery Pack - Hitachi 3080 G2 Hardware Reference Manual

LEDs

NVRAM backup battery pack

Each server contains a battery pack. The battery pack maintains the NVRAM
contents when the server is not receiving power (due to a power failure or a
short-term shut down). The battery pack is located behind the front bezel
cover of the server, on the left-hand side. The battery pack is hot-swappable
and can only be accessed after the front bezel has been removed.
Figure 5-4 Model 3080 and 3090 NVRAM backup battery pack (front view)
Battery pack characteristics:
• Each server contains a single battery module. The module contains dual
• The battery pack uses NiMH technology.
• A battery pack has a two year operational life. A timer starts when a
• The battery pack is periodically tested to ensure it is operational.
• A fully charged battery pack maintains the NVRAM contents for
42
Meaning
If this LED is on during the course of normal operation (not after installing a
new hard disk), either the disk has failed or the server's RAID configuration has
been degraded.
Figure 5-5 NVRAM battery backup pack location behind bezel
redundancy inside.
server is booted for the first time, and the timer is manually restarted
when a replacement batter pack is installed. After two years of operation,
a log warning event is issued to warn the user that the battery pack should
be replaced.
approximately 72 hours.
Hitachi NAS Platform server components
Hitachi NAS Platform 3080/3090 G2 Hardware Reference Guide