HP XP P9500 Storage - Manual (Page 46)

where
•
the value enclosed in ceil( ) must be rounded up to the nearest whole number.
•
user-specified-CV-capacity is expressed in megabytes.
•
The resulting user area capacity is expressed in kilobytes.
To calculate the entire capacity of a CV:
ceil(user-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
•
boundary value is expressed in kilobytes. The boundary value depends on volume emulation
types and RAID levels (see “Boundary values for RAID levels other than Enhanced mode on
SATA drives” (page 49) ). If the data protection level is set to the Enhanced mode on a SATA
drive, the boundary value depends on volume emulation types and RAID levels (see
“Boundary values for RAID levels (enhanced data protection level on SATA drives)” (page
49)
).
•
The resulting entire capacity is expressed in megabytes.
Calculating OPEN-V volume size (CV capacity unit is blocks)
To calculate the user area capacity of a CV whose capacity unit is defined as blocks:
ceil(user-specified-CV-capacity / 2)
where
•
the value enclosed in ceil( ) must be rounded up to the nearest whole number.
•
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 / (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.
•
boundary-value is expressed in kilobytes. The boundary value depends on volume emulation
types and RAID levels (see “Boundary values for RAID levels (enhanced data protection level
on SATA drives)” (page 49) ). If the data protection level is set to the Enhanced mode on a
SATA drive, the boundary value depends on volume emulation types and RAID levels (see
“Capacity of a slot” (page 49) )
•
The resulting entire capacity is expressed in blocks. To convert the resulting entire capacity
into megabytes, divide this capacity by 2,048.
Calculating fixed-size open-systems volume size (CV capacity unit is MB)
To calculate the user area capacity of a CV whose capacity unit is defined as megabytes:
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.
46 Configuring custom-sized provisioning