Each ZFS component must be named according to the following rules:
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Empty components are not allowed.
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Each component can only contain alphanumeric characters in addition to the following four special characters:
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Underscore (_)
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Hyphen (-)
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Colon (:)
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Period (.)
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Pool names must begin with a letter, except for the following restrictions:
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The beginning sequence c[0-9] is not allowed
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The name log is reserved
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A name that begins with mirror, raidz, or spare is not allowed because these name are reserved.
In addition, pool names must not contain a percent sign (%)
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Dataset names must begin with an alphanumeric character. Dataset names must not contain a percent sign (%).
