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什么是永久性缓存备份设备故障?

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解答

如果永久性缓存备份设备的诊断测试失败、则设备将被视为不可用。只要永久缓存备份设备的可用容量小于缓存内存的可用容量、所有卷都将更改为直写缓存。 

  • 这将生成一个恢复失败条目,说明缓存备份设备容量不足
  • 配置为不使用电池进行写入缓存的卷不会受到影响

注:丢失永久缓存备份设备可能(虽然不可能发生)不会导致永久存储的可用容量低于缓存内存的可用容量。在这种情况下,缓存不会受到影响。

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