Hitachi HUS VM, User And Reference Manual

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Status Universal Replicator Pair Status Primary Secondary
• SSWS is displayed by CCI, from which the
horctakover command is issued.
• Storage Navigator displays this status as PSUS or
PSUE.
PFUL If data in the journal volume exceeds 80%, pair status
changes to PFUL. The write data that inflows then is
monitored during the Data Overflow Watch.
PFUL status is displayed by CCI. Storage Navigator
displays this status as PAIR.
R/W enabled R enabled
Table 6-4 Pair status versus TrueCopy/Universal Replicator commands
-
TrueCopy/Universal Replicator command
paircreate pairsplit pairresync
# Status Copy Nocopy
-r or -rw
option
-P option -S option Resync
1 SMPL Accepted 2 Accepted 3 Rejected Rejected Acceptable Rejected
2 COPY Acceptable Acceptable Accepted 4 Rejected Accepted 1 Acceptable
3 PAIR Acceptable Acceptable Accepted 4 Accepted 4 Accepted 1 Acceptable
4 PSUS Rejected Rejected Acceptable Acceptable Accepted 1 Accepted 2*
5 PSUE Rejected Rejected Acceptable Acceptable Accepted 1 Accepted 2*
6 PDUB Rejected Rejected Rejected Rejected Accepted 1 Accepted 2*
Legend:
Accepted = Accepted and executed. When the operation terminates normally, the status changes to the
indicated number.
Acceptable = Accepted but no operation is executed.
Rejected = Rejected and operation terminates abnormally.
Pairsplit of a TrueCopy Async volume is returned after verification of state
transition that waits until delta data is synchronized from P-VOL to S-VOL.
Note: In the case of the SSWS status after SVOL-SSUS-takeover execution,
the pairresync command (from P-VOL to S-VOL) is rejected because the
delta data for S-VOL becomes dominant, and its status is expected to be
using the -swaps(p) option of pairresync . If the pairresync command
(from P-VOL to S-VOL) is rejected, confirm this special status using the -fc
option of the pairdisplay command.
The following table shows the relation of command acceptances for paired
status and ShadowImage.
Data replication operations with CCI
6-21
Command Control Interface User and Reference Guide