Idle task LED | Gas pedal LED | Controller CPU activity level |
status | status |
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Blinking | Off | |
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Off | Blinking | |
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Off | On steadily | |
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On steadily | On steadily | |
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Battery pack LEDs
Only the cache upgrade module has a battery pack. The LEDs for the battery pack are viewable on the cache board.
Item 1 | Item 2 (green | Interpretation |
(amber LED) | LED) |
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— | Steady glow | The cache batteries are being charged. (The |
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| charging process takes less than three hours.) |
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— | Fast blink | The cache microcontroller is waiting for the host |
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| controller to communicate. |
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Steady glow | — | One of the following situations is occurring: |
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| • There is a short circuit across the battery |
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| terminals or within the battery pack. |
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| • The host controller is updating the cache |
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| microcontroller firmware. |
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Fast blink | — | There is an open circuit across the battery |
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| terminals or within the battery pack. |
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Diagnosing array problems 31
