If both logmap_len and loglen are specified
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if logmap_len is greater than loglen/2, vxvol fails with an error message. Either increase loglen to a sufficiently large value, or decrease logmap_len to a sufficiently small value.
The value of logmap_len cannot exceed the number of bytes in the on-disk map.
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If logmap_len is specified
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The value is constrained by size of the log, and cannot exceed the size of the on-disk map.Thesize of the on-disk map in blocks can be calculated from the following formula:
round(loglen/nmaps) - 24
where nmaps is 2 for a private disk group, or 33 for a shared disk group.
The value of logmap_len cannot exceed the number of bytes in the on-disk map.
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If loglen is specified
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