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20 Chapter 2 Overview of CCI Operations
LEGEND for Table 2.2, Table 2.3, and Table 2.4:
Accepted = Accepted and executed. When operation terminates normally, the status
changes to the indicated number.
Acceptable = Accepted but no operation is executed.
Rejected = Rejected and operation terminates abnormally.
Table 2.2 Pair Status versus TrueCopy and Universal Replicator Commands
Hitachi TrueCopy Command
Paircreate Pairsplit Pairresync
# Status Copy Nocopy -r or -rw option -P option -S option Resync
c SMPL Accepted d Accepted e Rejected Rejected Acceptable Rejected
d COPY Acceptable Acceptable Accepted f Rejected. Accepted c Acceptable
e PAIR Acceptable Acceptable Accepted f Accepted f Accepted c Acceptable
f PSUS Rejected Rejected Acceptable Acceptable Accepted c Accepted d
(see Note)
g PSUE Rejected Rejected Rejected Rejected Accepted c Accepted d
(see Note)
h PDUB Rejected Rejected Rejected Rejected Accepted c Accepted d
(see Note)
Pairsplit of a Hitachi TrueCopy Asynchronous volume will be returned after verification of
state transition that waits until delta data is synchronized from P-VOL to S-VOL.
Note: In case of the SSWS state after SVOL-SSUS-takeover, pairresync command (from
PVOL to SVOL) is rejected because the delta data for SVOL becomes dominant, and its state
expect to be using -swaps(p) option of pairresync. If the pairresync command (from PVOL to
SVOL) is rejected, confirm this special state using the -fc option of the pairdisplay
command.