HP 200 HP StorageWorks 200 Storage Virtualization System owner's guide (AE071- - Page 29

Backup batteries

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Backup batteries Internal batteries provide backup power for the cache memory, shared memory, and the CHIPs. The backup batteries enable the system to continue normal operations for up to 20 milliseconds after the loss of AC power. When AC power is off longer than 20 milliseconds, the system executes its backup process. This process copies the contents of cache and shared memory to storage and then supports cache and shared memory for up to 36 hours. Anytime the length of a power outage exceeds the 36-hour battery backup time, contact HP for assistance with recovery. When power is restored, if the Auto-Power-On jumper is in the ENABLE position, the system powers on automatically. If the jumper is in the DISABLE position, you must turn the power switch on to power up the system. HP representatives will assist you in determining which Auto-Power-On mode is best for your system configuration and will configure the selected mode during system installation. HP StorageWorks 200 Storage Virtualization System owner's guide 29

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Backup batteries
Internal batteries provide backup power for the cache memory, shared memory, and the
CHIPs. The backup batteries enable the system to continue normal operations for up to
20 milliseconds after the loss of AC power.
When AC power is off longer than 20 milliseconds, the system executes its backup
process. This process copies the contents of cache and shared memory to storage and
then supports cache and shared memory for up to 36 hours. Anytime the length of a
power outage exceeds the 36–hour battery backup time, contact HP for assistance
with recovery.
When power is restored, if the Auto-Power-On jumper is in the ENABLE position, the
system powers on automatically. If the jumper is in the DISABLE position, you must
turn the power switch on to power up the system. HP representatives will assist you in
determining which Auto-Power-On mode is best for your system con
fi
guration and will
con
fi
gure the selected mode during system installation.
HP StorageWorks 200 Storage Virtualization System owner’s guide
29