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Auto LUN XP user guide for the XP12000/XP10000 21
Calculating differential tables for open-system volume migration
When you migrate open-system volumes, use the information in Table 6 to calculate the total number of
required differential tables per migration plan.
The following table shows the number of control cylinders according to the emulation type.
NF80-K 7
NF80-KA 7
NF80-KB 7
NF80-KC 7
Table 5 Control cylinders by emulation type (continued)
Table 6 Total number of differential tables per migration plan
Emulation type Equation
OPEN-3 Total number of differential tables per migration plan =
(X): Capacity of the volume to be migrated (KB)
1, 2
(Y): Number of control cylinders associated with the emulation type (see Table 7)
(Z): Number of slots that can be managed by a differential table
NOTE: Round the result of the calculation up to the nearest whole number.
For example, if the volume’s emulation type is OPEN-3, and it is not a custom volume, the
volume capacity (X) is the default volume size, 2,403,360 KB, and the total number of
differential tables is calculated as follows:
When you round to the nearest whole number, the result is 1. Therefore, the total number of
differential tables for one migration plan is 1 when the emulation type is OPEN-3.
1. If the selected volume is a CVS (custom volume size) volume, use the capacity of the custom volume instead of the default volume
capacity for the emulation type. Since the OPEN-L emulation type does not support custom volume operations, you must use the
default volume capacity of OPEN-L for X.
2. 1 KB equals 1024 bytes.
OPEN-8
OPEN-9
OPEN-E
OPEN-L
OPEN-V Total number of differential tables per migration plan =
(X): Capacity of the volume to be migrated (KB)
2
(Z): Number of slots that can be managed by a differential table
NOTE: Round the result of the calculation up to the nearest whole number.
For example, if the volume capacity (X) is the maximum OPEN-V volume capacity of
3,019,898,880 KB, the total number of differential tables is calculated as follows:
When you round up to the nearest whole number, the result is 193. Therefore, the total number
of differential tables for migration plan is 193 when the emulation type is OPEN-V.
Table 7 Control cylinders by emulation type
Emulation type Number of control cylinders
OPEN-3 8 (5,760KB)
OPEN-8 27 (19,440KB)
OPEN-9
OPEN-E 19 (13,680KB)
X 48÷()Y15×()+[]Z÷
1,916 32×()
2,403,360 48÷()815×()+[]1,916 32×()÷ 0.81860=
X 256÷()Z()÷
1,916 32×()
3,019,898,880 256÷()1,916 32×()÷ 192.40084=