Hitachi ShadowImage for IBM z/OS User"s Guide (T5213-96002, June 2007)

2-22 About ShadowImage™ for IBM
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z/OS
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Operations
Hitachi ShadowImage™ for IBM
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z/OS
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User’s Guide
Volume Migration
SIz volumes can be assigned to migration volumes of Volume Migration.
However, if the SIz S-VOL is already paired with three T-VOLs, you must
delete the SIz pairs before migrating the volumes by Volume Migration. Also, if
you want to assign SIz volumes to destination volumes of migration by Volume
Migration, or reserve SIz volumes for Volume Migration, you must delete the
SIz volumes or un-reserve SIz volumes before using the volumes by Volume
Migration. If you assign an SIz S-VOL that is already paired with three T-VOLs
to migration volumes of Volume Migration, or assign SIz volumes to other
Volume Migration volumes than migration volumes, the command will be
rejected.
Also, if you split the SIz pair that is assigned to Volume Migration’s migration
volumes, migration of those volumes will be canceled.
Note: You cannot use migration volumes, destination volumes, and reserved
volumes of Volume Migration for SIz pair operations (the command will be
rejected). If you want to use Volume Migration volumes for SIz pair
operations, you must release the volumes by Volume Migration.
Universal Volume Manager
SIz operations can also be performed in conjunction with Universal Volume
Manager operations to create pairs with external volumes. For the details on
the external volumes, see the Universal Volume Manager User’s Guide.
TrueCopy for z/OS
TCz volumes can be assigned to SIz pairs, and SIz volumes can be assigned to
TCz pairs.
Note: ShadowImage for z/OS is recommended for intra-storage system copy
operations. If ShadowImage for z/OS is not installed, TCz (synchronous only)
can be used to copy within the same USP V storage system. This TCz
configuration requires at least one external Fibre Channel interface cable loop
(minimum of two is recommended).
ShadowImage for z/OS and TrueCopy for z/OS can function together in the
same USP V storage system to provide both internal and remote backup for
your important data.
• When SIz and TCz pairs share the same volume, to obtain the SIz pair
status, query from the host:
– the T-VOL status of the SIz pair if the SIz S-VOL and TCz M-VOL share
the same volume,
– the T-VOL status of the SIz pair if the SIz S-VOL and TCz R-VOL share
the same volume, and