SVS200 LUN Manager and Volume Manager (T1714-96015, October 2007)

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Table 25 CV capacity by emulation type (open systems)

Emulation type

Minimum CV capacity

(CYL)

Maximum CV capacity

(CYL)

Number of control

cylinders (Cyl)

OPEN-V 48,000 KB

3,019,898,880

KB (2.8125

TB)

0KB(0Cyl)

OPEN-3

36,000 KB (50 Cyl)

2,403,360 KB

5,760 KB (8 Cyl)

OPEN-8

36,000 KB (50 Cyl)

7,175 , 52 0 K B

19,440 KB (27 Cyl)

OPEN-9

36,000 KB (50 Cyl)

7, 211, 52 0 K B

19,440 KB (27 Cyl)

OPEN-E

36,000 KB (50 Cyl)

14 , 226 ,4 8 0 K B

13 ,6 8 0 K B (19 Cy l )

NOTE:

CVS functions are not applicable to OPEN-L volumes.

Calculating CV capacity for mainframe systems

When creating a CV, you can specify the CV's capacity. However, there is a margin of error between

the user-speciﬁed CV capacity and the actual CV capacity. To estimate the actual CV capacity, use the

following formula. The resulting CV capacity is expressed in megabytes.

↑ (user-speciﬁed-CV-capacity + management-area-capacity)×15×capacity-of-a-slot ÷ boundary-value ↑

× boundary-value ÷1024

NOTE:

• Roundupthevalueenclosedbytwouparrows(↑) to the nearest whole number.

• The user-speciﬁed CV capacity is expressed in cylinders.

• The management area capacity is expressed in cylinders (see Table 26).

• The boundary value is expressed in kilobytes. The boundary value depends on volume emulation

types and RAID levels (see Table 28).

• The slot capacity is expressed in kilobytes. The slot capacity depends on the volume emulation

types (see Table 29).

Calculating CV capacity for open systems

When creating a CV, you can specify the CV's capacity. However, there is a margin of error between the

user-speciﬁed CV capacity and the actual CV capacity.

This section explains how to calculate the user area capacity and the entire capacity. The term “user area

capacity” refers to the capacity of areas in a CV that can contain user data.

If the em

ulation type is OPEN-V

The methods for calculating the CV's user area capacity and the entire capacity vary depending on the

CV capacity unit speciﬁed when creating the CV.

• If the CV capacity unit is megabytes (MB):

To calculate the CV's user area capacity, use the following formula. The resulting user area capacity

is expr

essed in kilobytes.

↑↑ user-speciﬁed-CV-capacity ×1024÷64↑ ÷15↑ ×64×15

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Overview of Volume Manager and Custom Volume Size