Performing CCI Operations
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Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide
If no data was written to the secondary volume while the pair was split, the
differential data on the primary volume is copied. If data was written to the
secondary volume, the differential data on the primary volume and
secondary volume is copied to the secondary volume. This process is
reversed when the ShadowImage –restore option is specified.
Before issuing the pairresync command (normal or reverse direction), make
sure that the secondary volume is not mounted on any UNIX system. Before
issuing a reverse pairresync command, make sure that the primary volume
is not mounted on any UNIX system.
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Figure 1-13: Pair Resynchronization
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Figure 1-14: Normal Resync and ShadowImage Restore Resync
NOTE: Commands that change the status of pairs (paircreate, pairsplit,
pairresync) cannot be executed while the host is being restarted in a
TrueCopy and TCE environment. Processing may end abruptly when a
command is executed while the host is being restarted.
Summary of Contents for AMS 2000 Series
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