Hitachi ShadowImage for z/OS user guide (HIT9503-96004, June 2006)

ShadowImage for z/OS user guide 105
Figure 57 Copying Data in Two Extents that Overlap (Two T-VOLs)
Figure 58 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 53
112336991817 17 34
Copying Data
in Two Extents
that do not
Overlap (Two
T-VOLs)
See Figure 54
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 55
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 56
3
(1 x 3)
149
(3 x 3)
31227
(9 x 3)
93651
(17 x 3)
17 68