Hitachi ShadowImage for z/OS user guide (December 2005)

100 ShadowImage for the XP128/XP1024/XP10000/XP12000
Figure 49 Copying Data in Two Extents that Overlap (Two T-VOLs)
Figure 50 Copying One Extent to Another in the Same Volume
Table 48 provides the calculation examples of the required resources according to the patterns of copying.
Table 48 Referential Examples for Calculating the Number of Resources Required to Create the FlashCopy Mirror
Version 2 Pairs
Copy
Patterns
Required number of resources
3380-3, 3390-1,
3390-2,
3390-3,3390-3R
3390-9 3390-L 3390-M
S-VOL T-VOL Total S-VOL T-VOL Total S-VOL T-VOL Total S-VOL T-VOL Total
Copying Data
in Two Extents
that do not
Overlap (One
T-VOL)
See Figure 45
112336991817 17 34
Copying Data
in Two Extents
that do not
Overlap (Two
T-VOLs)
See Figure 46
12
(1+1)
33 6
(3 + 3)
99 18
(9 + 9)
27 17 34
(17 + 17)
51
Copying Data
in Two Extents
that do not
Overlap (Two
S-VOLs)
See Figure 47
2
(1 + 1)
136
(3 + 3)
3 9 18
(9+9)
92734
(17+17)
17 51
Copying Data
in Three
Extents that
Overlap (One
T-VOL)
See Figure 48
3
(1 x 3)
149
(3 x 3)
31227
(9 x 3)
93651
(17 x 3)
17 68