HP XP P9000 Provisioning for Open Systems User Guide

• boundary-value is expressed in kilobytes. The boundary value depends on volume emulation
types and RAID levels (see “Boundary values for RAID levels (Enhanced mode on SATA drives)”
(page 50)). 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 50))
• 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.
• capacity-of-a-slot is expressed in kilobytes. The capacity of a slot depends on volume
emulation types (see “Calculated management area capacities (SATA-E drive)” (page 50)).
• 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 “Boundary values for RAID levels (other than Enhanced
mode on SATA drives)” (page 50)).
• boundary-value is expressed in kilobytes. The boundary value depends on volume emulation
types and RAID levels (see “Boundary values for RAID levels (Enhanced mode on SATA drives)”
(page 50)). 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 50)).
• 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.
VLL size calculations 47