HP StorageWorks XP Remote Web Console Software - Manual (Page 28)

Table 10 Total Number of Differential Tables Per Migration Plan
Expression Emulation Type
Total number of differential tables per migration plan = ((X) ÷ 48 + (Y) Ч 15) ч (Z)
(X): The capacity of the volume to be migrated (kilobyte). 1
(Y): The number of control cylinders. See Table 11 (page 28) .
(Z): The number of slots that can be managed by a differential table (20,448).
NOTE: Round up the number to the nearest whole number.
For example, if the emulation type of a volume is OPEN-3 and the number of cylinders on the
volume is 2,403,360 kilobytes ((X) in the expression), the calculation of the total number of
differential tables is as follows:
(2,403,360 ч 48 + 8 Ч 15) ч 20,448 = 2.454518779
When you round up 2.454518779 to the nearest whole number, it becomes 3. Therefore, the
total number of differential tables for one migration plan is 3 when the emulation type is OPEN-3.
One pair table can be used for 36 differential tables. Therefore, the total number of pair tables
for one migration plan is 1 when the emulation type is OPEN-3.
OPEN-3
OPEN-8
OPEN-9
OPEN-E
OPEN-L
Total number of differential tables per migration plan = ((X) ч 256) ч (Z)
(X): The capacity of the volume to be migrated (kilobyte). 1
(Z): The number of slots that can be managed by a differential table (20,448).
NOTE: Round up the number to the nearest whole number.
For example, if the emulation type of a volume is OPEN-V and the number of cylinders on the
volume is 3,019,898,880 kilobytes ((X) in the expression), the calculation of the total number of
differential tables is as follows:
(3,019,898,880 ч 256) ч 20,448 = 576.9014085
When you round up 576.9014085 to the nearest whole number, it becomes 577. Therefore,
the total number of differential tables for one migration plan is 577 when the emulation type is
OPEN-V.
One pair table can be used for 36 differential tables. Therefore, the total number of pair tables
for one migration plan is 17 when the emulation type is OPEN-V. The emulation type OPEN-V
can only be used if you use multiple pair tables on the open system.
OPEN-V
1 If the volume is divided by the VLL function, this value is the capacity of the divided volume. If the emulation type is
OPEN-L, the VLL function is unavailable.
Table 11 (page 28) shows the number of control cylinders according to the emulation types.
Table 11 Number of Control Cylinders According to the Emulation Types
Number of Control Cylinders Emulation Type
8 (5,760 KB) OPEN-3
27 (19,440 KB) OPEN-8
OPEN-9
19 (13,680 KB) OPEN-E
7 (5,040KB) OPEN-L
0 (0KB) OPEN-V
Notes on Migrating XP Thin Provisioning Virtual Volumes
This section describes the appropriate combination of source volumes and target volumes that are
also XP Thin Provisioning virtual volumes. Depending on the state of the pool related to the target
volume that is also an XP Thin Provisioning virtual volume, a warning message may appear or
manual migration plan may not be created.
Table 12 (page 29) shows the combination of a source
28 About XP Auto LUN Operations