Oracle Sun Netra X4270, Руководство по обслуживанию

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Replacing the ESM Riser and ESM
See “Returning Server to Operation” on page 211 .
Related Information
■
“Remove the Flash Module Cable” on page 147
Replacing the ESM Riser and ESM
The energy storage module provides backup power to the flash modules when the system power
is off or interrupted. The ESM is stored in a ESM riser, which is installed to the motherboard
assembly.
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“ESM Fault LEDs” on page 150
■
“Troubleshoot ESM Faults” on page 151
■
“Remove ESM Riser” on page 152
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“Install ESM Riser” on page 154
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“Replace the ESM” on page 155
ESM Fault LEDs
The system provides two ESM fault LEDs to help you detect ESM failures:
■
Capacitor Charged LED on the ESM riser
This LED lights green when the ESM is fully charged. In the event of a power failure, the
ESM provides power to the flash modules to allow them to store their internal working state
and any cached data into the flash array. The Capacitor Charged LED will turn off when the
ESM discharges all of its stored power.
■
ESM fault LED on the motherboard
If either the ESM riser or ESM fails, this LED lights amber when you press the Fault
Remind button.
150 Sun Netra X4270 Server • September 2015