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See Table 4-1 for the meanings of the SPS status LEDs.
DC SPS Status LEDs
Table 4-1
Light
SPS fault - Amber
Replace battery - Amber
On battery - Amber
On-line - Green
For a rackmount installation, two SPS units fit in a tray beneath the
IP4700 to which they connect. Figure 4-2 shows the SPS in a cabinet
with an IP4700 and DAE in rackmount installations.
The Standby Power Supply (SPS)
Meaning When Lit
The SPS has an internal fault. The SPS may still be able
to run on line, but write caching cannot occur. Replace
the SPS as soon as possible. See "Replacing an SPS in
a Rackmount System" on page 4-12.
The SPS battery pack can no longer support loads.
When the battery reaches this state, and no other on-line
SPS is connected to the IP4700, the file server flushes all
cache data to disk and disables caching. This LED stays
active until the SPS completes a successful power test.
Replace the SPS as soon as possible. See "Replacing an
SPS in a Rackmount System" on page 4-12.
The ac line power is no longer available and the SPS is
supplying dc output power from its battery. When battery
power comes on, and no other on-line SPS is connected
to the IP4700, the file server writes all cached data to
disk; and the event log records the event.
When this LED is steady, the SPS is ready and operating
normally. When this LED blinks, the SPS is being
charged. In either case, the output from the SPS is
supplied by ac line input.
About the SPS
4-3
4
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