HP StorageWorks XP Remote Web Console Software - Manual (Page 50)

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When using the Preserve Mirror FlashCopy function, HP recommends setting the time
of MIH (Missing Interrupt Handler) timer to the setting time of MIH timer (45 seconds) when
operating a TCz synchronous pair.
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When using the Preserve Mirror FlashCopy function, HP recommends setting the
missing interrupt handler (MIH) timer to 45 seconds when operating TCz synchronous pairs.
CAUTION: When you create a Version 2 relationship with COPY mode by using the Preserve
Mirror FlashCopy function, the relationships are established in local site and remote sites, but
the both copies are not being synchronized. When Withdraw is issued while copying, the both
copy operations for Version 2 relationship stop. In this case, the consistency between S-VOL and
T-VOL cannot be guaranteed even if the TCz pair status is Duplex.
This status can be verified by using the TCz PPRC CQUERY command and the StorageNavigator
TCz window. For more details, see the TrueCopy for IBM z/OS User’s Guide.
Due to an error, only the relationship in the remote site might be established when the relationship
in the local site cannot be established. In this case, the relationship cannot be established even if
you retry creating a Version 2 relationship by using the Preserve Mirror FlashCopy function.
Release the relationship in the remote site and try again.
The following figures show the copying process of Version 2 pairs and TCz pairs with the Preserve
Mirror FlashCopy
function (in the case of COPY mode).
50 About Version 2 Operations