LED3 pattern | LED4 pattern | Interpretation |
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Off | Flashing (2 Hz) | The system is powered down, and the cache contains data that has not |
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| yet been written to the drives. Restore system power as soon as |
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| possible to prevent data loss. |
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| Data preservation time is extended any time that 3.3 V auxiliary |
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| power is available, as indicated by LED 2. In the absence of auxiliary |
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| power, battery power alone preserves the data. A |
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| battery can normally preserve data for at least 2 days. |
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| The battery lifetime also depends on the cache module size. For more |
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| information, see the controller QuickSpecs on the HP website |
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| |
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Off | Double flash, then | The cache microcontroller is waiting for the host controller to |
| pause | communicate. |
Off | Flashing (1 Hz) | The battery pack is below the minimum charge level and is being |
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| charged. Features that require a battery (such as write cache, capacity |
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| expansion, stripe size migration, and RAID migration) are unavailable |
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| temporarily until charging is complete. The recharge process takes |
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| between 15 minutes and 2 hours, depending on the initial capacity of |
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| the battery. |
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Off | On | The battery pack is fully charged, and posted write data is stored in the |
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| cache. |
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Off | Off | The battery pack is fully charged, and no posted write data exists in |
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| the cache. |
Flashing (1 Hz) | Flashing (1 Hz) | An alternating green and amber flashing pattern indicates that the |
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| cache microcontroller is executing from within its boot loader and |
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| receiving new flash code from the host controller. |
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On | — | A short circuit exists across the battery terminals or within the battery |
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| pack. BBWC features are disabled until the battery pack is replaced. |
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| The life expectancy of a battery pack is typically more than 3 years. |
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Flashing (1 Hz) | — | An open circuit exists across the battery terminals or within the battery |
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| pack. BBWC features are disabled until the battery pack is replaced. |
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| The life expectancy of a battery pack is typically more than 3 years. |
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Component identification 29