Hitachi VSP F1500

Table 6-5 Pair status versus ShadowImage commands
-
ShadowImage command
paircreate pairsplit pairresync
Pair Status No -split -split -E option -C option -S option Resync
1 SMPL Accepted 2 Accepted 2
to 4
Rejected Rejected Acceptable Rejected
2 COPY
RCPY
Acceptable Accepted [1]
2 to 4
Accepted 5 Accepted [1]
2 to 4
Accepted 1 Acceptable
3 PAIR Acceptable Accepted [2]
2 to 4
Accepted 5 Accepted [2]
2 to 4
Accepted 1 Acceptable
4 PSUS Rejected Acceptable Accepted 5 Acceptable Accepted 1 Accepted 2
5 PSUE Rejected Acceptable Acceptable Acceptable 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.
In the following descriptions, when the pair statuses of P-VOL and S-VOL are
different, PVOL_ or SVOL_ are applied to show which volume is indicated.
Note: If the P-VOL does not have Write in the PAIR state, then data identical
with an S-VOL is guaranteed. Therefore, when using the S-VOL with the SMPL
state, after stopping Write to the P-VOL, generate a paired volume, and then
split the paired volume after confirming that the paired volume has the PAIR
status. In the PSUE state, ShadowImage does not manage differential data at
the P-VOL or S-VOL. Therefore, pairresync issued to a pair in the PSUE state
is all copy performance, but the copy progress rate returned by the -fc option
of the pairdisplay command indicates "0%".
[1]: The (2 to 4) state change is effective for only the COPY state that is
changed without specification of -split for paircreate command.
[2]: The (2 to 4) state change appears as P-VOL_PSUS & S-VOL_COPY (see
example below), and reading and writing are enabled for S-VOL in
SVOL_COPY state.
# pairsplit -g oradb
# pairdisplay -g oradb -fc
Group PairVol(L/R) (Port#,TID,LU-M), Seq#, LDEV#.P/S, Status, % ,
P-LDEV# M
oradb oradev3(L) (CL2-N , 3, 4-0) 8071 28..P-VOL PSUS,
100 29 W
oradb oradev3(R) (CL2-N , 3, 5-0) 8071 29..S-VOL COPY,
97 28 -
PVOL_PSUS & SVOL_COPY is the non-reflected PSUS state that data is still
being copied from the P-VOL to the S-VOL, and this state has the following
specific behavior.
6-22
Data replication operations with CCI
Command Control Interface User and Reference Guide