Calculating fixed-size volume size (CV capacity unit is blocks)
To calculate the user area capacity of a CV whose capacity unit is defined as blocks:
user-specified-CV-capacity / 2
where
user-specified-CV-capacity is expressed in blocks.
The resulting user area capacity is expressed in kilobytes.
To calculate the entire capacity of a CV:
ceil((user-specified-CV-capacity + management-area-capacity * 2) / (boundary-value * 2)) * (boundary-value * 2)
where
the value enclosed in ceil( ) must be rounded up to the nearest whole number.
user-specified-CV-capacity is expressed in blocks.
management-area-capacity is expressed in kilobytes. The management area capacity depends on volume emulation types (see Management area capacity of an volume).
boundary-value is expressed in kilobytes. The boundary value depends on volume emulation types and RAID levels (see Boundary values for RAID levels).
The CV capacity recognized by hosts is the same as the CV capacity calculated by the above formula.
If block is selected as the LDEV capacity unit in the Create LDEVs window and dialog boxes, the window and dialog boxes correctly show the calculated LDEV capacity. However, if MB, GB, or TB is selected as the LDEV capacity unit in the Create LDEVs window and dialog boxes, the capacity values shown might have a margin of error due to unit conversion reasons. If you need to know the exact LDEV capacity, select block as the capacity unit.
The resulting entire capacity is expressed in blocks. To convert the resulting entire capacity into megabytes, divide this capacity by 2,048: