Hitachi ShadowImage for z/OS user guide (HIT9503-96007, October 2007)

102 ShadowImage for the XP1024/XP128/XP12000/XP10000/SVS 200
The extent that is already set as the copy target cannot be used as a copy source extent to create a new
FlashCopy Mirror Version 2 pair. In other words, you cannot create a cascaded FlashCopy Mirror Version
2 pairs. See Figure 47 for the example.
Figure 47 Example of the Case FlashCopy Mirror Version 2 Pair Cannot be Created
Table 44 shows the requirements for using FlashCopy Mirror Version 2.
Table 45 shows the emulation types supported by FlashCopy Mirror Version 2, and the condition for
combination of S-VOL and T-VOL.
If the emulation type begins with 3390, you can specify the volumes of different emulation types for S-VOL
and T-VOL. However, you cannot create a pair using a 3380-3 volume and a volume with an emulation
type that begins with 3390. In the case of a 3380-3 volume, you must specify 3380-3 volumes for both
S-VOL and T-VOL.
NOTE: Whether or not you can perform the copy via host depends on the status of the URz pair. For more
information, see the Universal Replicator for z/OS® User’s Guide.
Functionalities of Compatible Mirroring for IBM FlashCopy Version2
FlashCopy Mirror Version 2 supports the functionalities below.
• Establishing multiple relationship (See ”Establishing Multiple Relationships” on page 103)
• Specifying COPY mode or NOCOPY mode (See ”Specifying COPY mode or NOCOPY mode” on
page 103)
Table 44 Requirements for FlashCopy Mirror Version 2
Item Requirement
Controller emulation type I-2105 or I-2107 (The controller emulation type of
an S-VOL and a T-VOL must be the same.)
Available volume FlashCopy Mirror Version 2 can use the volume
whose CU:LDEV (control unit image: logical
device ID) is between 00:00 and 3F:FF.
Table 45 Emulation Types Supported by FlashCopy Mirror Version 2
Emulation Type
of S-VOL
Emulation Type of T-VOL
3380-3 3390-3 3390-3R 3390-9 3390-L 3390-M
3380-3 OKXXXXX
3390-3 X OKOKOKOKOK
3390-3R X OKOKOKOKOK
3390-9 X OKOKOKOKOK
3390-L X OKOKOKOKOK
3390-M X OKOKOKOKOK