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216 Chapter 4 Performing CCI Operations
4.9 Checking Hitachi TrueCopy Pair Currency (Paircurchk)
The CCI paircurchk command checks the currency of the Hitachi TrueCopy secondary
volume(s) by evaluating the data consistency based on pair status and fence level.
Table 4.18 specifies the data consistency for each possible state
of a TrueCopy volume. A
paired volume or group can be specified as the target of the paircurchk command. The
paircurchk command assumes that the target is an S-VOL. If the paircurchk command is
specified for a group, the data consistency of each volume in the group is checked, and all
inconsistent volumes are found in the execution log file and displayed. Paircurchk is also
executed as part of the TrueCopy takeover (horctakeover) command (see next section).
Table 4.18 Data Consistency Displayed by the Paircurchk Command
Object Volume Currency
Attribute Status Fence Paircurchk SVOL_takeover
SMPL − − To be confirmed −
P-VOL − − To be confirmed −
S-VOL COPY Data Inconsistent Inconsistent
Status
Never
Async Inconsistent Inconsistent
PAIR Data OK OK
Status OK OK
Never To be analyzed To be analyzed
PAIR Async To be analyzed OK (assumption)
PFUL To be analyzed OK (assumption)
PSUS Data Suspected Suspected
Status Suspected Suspected
Never Suspected Suspected
PSUS Async Suspected Suspected
PFUS Suspected OK (assumption)
PSUE Data OK OK
PDUB Status Suspected Suspected
Never Suspected Suspected
Async Suspected OK (assumption)
SSWS Data Suspected −
Status Suspected
Never Suspected
Async Suspected