ceil(ceil(user-specified-CV-capacity * 1024 /
capacity-of-a-slot) / 15) * capacity-of-a-slot * 15
where
•
the value enclosed in
ceil( )
must be rounded up to the nearest whole number.
•
user-specified-CV-capacity
is expressed in megabytes.
•
capacity-of-a-slot
is expressed in kilobytes. The capacity of a slot depends on volume
emulation types (see
“Capacity of a slot” (page 49)
).
•
The resulting
user area capacity
is expressed in kilobytes.
To calculate the entire capacity of a CV:
ceil((user-area-capacity + management-area-capacity) /
boundary-value) * boundary-value / 1024
where
•
The value enclosed in
ceil( )
must be rounded up to the nearest whole number.
•
user-area-capacity
is expressed in kilobytes.
•
management-area-capacity
is expressed in kilobytes. The management area capacity
depends on volume emulation types (see
“Management area capacity of an open-systems
).
•
boundary-value
is expressed in kilobytes. The boundary value depends on volume emulation
types and RAID levels (see
“Boundary values for RAID levels” (page 49)
).
•
The resulting entire capacity is expressed in megabytes.
Calculating fixed-size open-systems 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 open-systems
).
•
boundary-value
is expressed in kilobytes. The boundary value depends on volume emulation
types and RAID levels (see
“Boundary values for RAID levels” (page 49)
).
•
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,
48
Configuring custom-sized provisioning