HP XP P9500 Storage - Manual (Page 21)

The following table shows when you can perform consistency group pair-split based on status of
the BC pairs in the consistency group that are not paired (status other than PAIR), and the resulting
pair status after you perform consistency group pair-split.
Status after you perform consistency
group pair-split Can you perform consistency group pair-split? The status of the pairs in the
consistency group that have a
status other than PAIR
PSUS YES COPY(PD)/COPY
PSUS YES
2
COPY(SP)/COPY
PSUS YES
2
PSUS(SP)/PSUS
PSUS YES
2
PSUS
The pair statuses remain the same. NO COPY(RS)/COPY
The command ends abnormally and shows the
following information:
[EX_CMDRJE] An order to the
control/command device was
rejected
1
The pair statuses remain the same. NO COPY(RS-R)/RCPY
The command ends abnormally and shows the
following information:
[EX_CMDRJE] An order to the
control/command device was
rejected
1
The pair statuses remain the same. NO PSUE
The command ends abnormally and shows the
following information:
[EX_CMDRJE] An order to the
control/command device was rejected
NOTE:
1
If you share the Cnt Ac-J S-VOL and the BC P-VOL, the command may end normally after you perform the
consistency group pair-split. Ensure the status of the pairs within the consistency group have changed to PSUS (use the
pairdisplay command).
2
Consistency is guaranteed only for BC pairs in PAIR or COPY(PD)/COPY status.
The following are examples of when you can perform consistency group pair-split based on status
of the BC pairs in the consistency group:
•
Example 1
The are six BC pairs in a consistency group. Two of the pairs are paired (PAIR status), two
are in COPY(PD)/COPY status, and two are in PSUS status. In this case, you can perform
consistency group pair-split, and doing so changes the status of all of the pairs in the consistency
group to PSUS.
•
Example 2
There are two BC pairs in a consistency group and one is paired (PAIR status) and the other
is in the process of being resynchronized (COPY(RS)/COPY status). In this case, you cannot
perform consistency group pair-split.
•
Example 3
The are six BC pairs in a consistency group. Two of the pairs are paired (PAIR status), two
are in the process of Quick Split (PSUS(SP)/PSUS status), and two are in PSUE status. In this
Consistency group pair-split at a specific time 21