3390-3 Emulation Type Example; Calculating The Required Amount Of Differential Tables For An Open-System Volume; Control Cylinders By Open Emulation Type - HP StorageWorks P9000 - Disk Arrays User Manual

Table 8 Number of Control Cylinders Based on Emulation Type (continued)
Emulation Type
3390-3, 3390-3A, 3390-3B, 3390-3C, 3390-3R
3390-9, 3390-9A, 3390-9B, 3390-9C
3390-L, 3390-LA, 3390-LB
3390-M, 3390-MA, 3390-MB, 3390-MC
3390-LC
NF80–F

3390-3 emulation type example

For this example, the emulation type of the mainframe volume is 3390-3. Recall the formula for
calculating the required amount of differential tables per migration plan:
(X (number of volume cylinders) + Y (number of control cylinders)) × 15 ÷ Z (number of slots that
can be managed by a differential table)
The number of volume cylinders for the 3390-3 emulation type is 3,339. The number of control
cylinders for the 3390-3 emulation type is 6 (see the preceding table). The number of slots that
can be managed by a differential table is 20,448. The formula is calculated below:
(3,339 + 6) x 15 / (20,448) = 2.45378521 1
When you round up 2.45378521 1 to the nearest whole number, it becomes 3. Therefore, the
total number of required differential tables for each migration plan is 3 when the emulation type
is 3390-3.
One pair table can be used for 36 differential tables. Therefore, the number of pair tables for one
migration plan is 1 when the emulation type is 3390-3.
Calculating the required amount of differential tables for an open-system
volume
When you migrate open-system volumes, you must determine the total number of required differential
tables and pair tables per migration plan. The equation to calculate the required amount of
differential tables will vary based on the emulation type. Figures are rounded up to the nearest
whole number.

Control cylinders by open emulation type

Before you can calculate the required amount of differential tables per migration plan, you must
know the number of control cylinders contained by the open-system volume. The following table
shows the number of control cylinders based on the emulation type.
Table 9 Number of Control Cylinders and Capacity Based on Emulation Type
Emulation Type
OPEN-3
OPEN-8, OPEN-9
OPEN-E
OPEN-L
OPEN-V
18 Auto LUN planning
Number of Control Cylinders
6
25
23
53
23
22
Control Cylinders (Capacity)
8 (5,760 KB)
27 (19,440 KB)
19 (13,680 KB)
7 (5,040 KB)
0 (0 KB)