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|Oracle Solaris Administration: ZFS File Systems Oracle Solaris 11 Information Library|
Each component can only contain alphanumeric characters in addition to the following four special characters:
Pool names must begin with a letter, except for the following restrictions:
The beginning sequence c[0-9] is not allowed.
The name log is reserved.
A name that begins with mirror, raidz, raidz1, raidz2, raidz3, or spare is not allowed because these names are reserved.
Pool names must not contain a percent sign (%).
Dataset names must begin with an alphanumeric character.
Dataset names must not contain a percent sign (%).
In addition, empty components are not allowed.