The pair status for all of the SIz pairs in the CTG determines if you can perform a consistency group (CTG) pair-split. If all of the SIz pairs in the CTG are paired (PAIR/DUPLEX status), you can perform a CTG pair-split.
The following table describes when you can perform a CTG pair-split, based on the SIz pairs in the CTG that are not paired (a status other than PAIR/DUPLEX), and the resulting pair status after you perform the pair-split.
|
Status of pairs in the CTG other than PAIR/DUPLEX |
Can you perform a CTG pair-split? |
Status after you perform a CTG pair-split |
|---|---|---|
|
CPPD/PENDING |
YES |
PSUS(or SSUS)/SUSPOP |
|
COPY/TRANS |
YES2 |
PSUS(or SSUS)/SUSPOP |
|
PSUP/SUSPVS |
YES2 |
PSUS(or SSUS)/SUSPOP |
|
PSUS(or SSUS)/SUSPOP |
YES2 |
PSUS(or SSUS)/SUSPOP |
|
CPRS/PENDING |
NO The command ends abnormally and shows the following information: [EX_CMDRJE] An order to the control/command device was rejected1 |
The pair statuses remain the same. |
|
RCPY/REVRSY |
NO The command ends abnormally and shows the following information: [EX_CMDRJE] An order to the control/command device was rejected1 |
The pair statuses remain the same. |
|
PSUE/SUSPER |
NO The command ends abnormally and shows the following information: [EX_CMDRJE] An order to the control/command device was rejected |
The pair statuses remain the same. |
|
Notes:
|
||
The following are examples of when you can perform a CTG pair-split based on status of the SIz pairs in the CTG:
- Example 1
The are six SIz pairs in a CTG. Two of the pairs are paired (DUPLEX status), two are in PENDING status, and two are in Split/SUSPOP status. In this case, you can perform a CTG pair-split, and doing so changes the status of all of the pairs in the CTG to . However, the S-VOLs that were in might not be consistent with the other volumes in the CTG.
- Example 2
There are two SIz pairs in a CTG and one is paired (DUPLEX status) and the other is in the process of being resynchronized (PENDING status). In this case, you cannot perform a CTG pair-split.
- Example 3
The are six SIz pairs in a CTG. Two of the pairs are paired (DUPLEX status), two are in the process of Quick Split ( status), and two are in Suspend/SUSPER status. In this case, the CTG pair-split ends abnormally and the status of all of the pairs in the CTG remains the same.