红帽全球峰会6.49.7. wipe_after_delete
指明磁盘的块在删除后是否将其读取为零：
- 在块存储上，磁盘将为零，然后才删除。
- 在文件存储中，因为文件系统已经保证之前删除的块会重新读取为零，因此该磁盘将立即删除。
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| （可选）引用设备所使用的实例类型。 | |
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| 磁盘所呈现的统计数据。 | |
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| 与此磁盘关联的存储域。 | |
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| （可选）引用设备所使用的模板。 | |
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不要使用这个元素，改为使用 | |
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| 对使用此设备的虚拟机的引用。 |
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