L1, L2 pair status and supported pair tasks
The pair tasks you can complete on cascaded pairs depend on the L1 and L2 pair status. The tasks are dependent on the following:
- To perform an L1 pair task, the status of the L2 pair.
- To perform an L2 pair task, the status of the L1 pair.
- Supported read/write on L1 and L2 S-VOLs.
The following table lists the L1 pair tasks that you can complete based on the related L2 status.
|
L2 pair status |
L1 pair task | ||||
|
Create pairs |
Split pairs |
Resynchronize pairs |
Suspend pairs |
Delete pairs | |
|
COPY(PD)/COPY |
YES |
YES |
YES |
YES |
YES |
|
PAIR |
YES |
YES |
YES |
YES |
YES |
|
COPY(SP)/COPY |
NO |
NO |
NO |
YES |
YES |
|
PSUS(SP)/PSUS |
NO |
NO |
NO |
YES |
YES |
|
PSUS |
YES |
YES |
YES |
YES |
YES |
|
COPY(RS)/COPY |
YES |
YES |
YES |
YES |
YES |
|
COPY(RS-R)/RCPY |
NO |
NO |
NO |
YES |
YES |
|
PSUE |
YES |
YES |
YES |
YES |
YES |
The following table lists the L2 pair tasks that you can perform based on the related L1 status.
|
L1 pair status |
L2 pair task | ||||
|
Create pairs |
Split pairs |
Resynchronize pairs1 |
Suspend pairs |
Delete pairs | |
|
COPY(PD)/COPY |
YES |
NO |
YES |
YES |
YES |
|
PAIR |
YES |
NO |
YES |
YES |
YES |
|
COPY(SP)/COPY |
YES |
NO |
YES |
YES |
YES |
|
PSUS(SP)/PSUS |
NO |
NO |
YES |
YES |
YES |
|
PSUS |
YES |
YES2 |
YES |
YES |
YES |
|
COPY(RS)/COPY |
YES |
NO |
YES |
YES |
YES |
|
COPY(RS-R)/RCPY |
YES |
NO |
YES |
YES |
YES |
|
PSUE |
YES |
NO |
YES |
YES |
YES |
| |||||
The following table lists the node volume read/write L1 and L2 pair status.
|
L1 Pair Status |
L2 pair status | ||||||
|
COPY(PD)/COPY |
PAIR |
COPY(SP)/COPY |
PSUS(SP)/PSUS |
PSUS |
COPY(RS)/COPY |
PSUE | |
|
COPY(PD)/COPY |
Read only |
Read only |
Read only |
Read only |
Read only |
Read only |
Read only |
|
PAIR | |||||||
|
COPY(SP)/COPY | |||||||
|
PSUS(SP)/PSUS |
Read/Write |
Read/Write |
Read/Write |
Read/Write |
Read/Write |
Read/Write |
Read/Write |
|
PSUS | |||||||
|
COPY(RS)/COPY |
Read only |
Read only |
Read only |
Read only |
Read only |
Read only |
Read only |
|
COPY(RS-R)/RCPY | |||||||
|
PSUE | |||||||
The following table lists the leaf vol read/write per L2 pair status.
|
L2 pair status | ||||||
|
COPY(PD)/COPY |
PAIR |
COPY(SP)/COPY |
PSUS(SP)/PSUS |
PSUS |
COPY(RS)/COPY |
PSUE |
|
Read only |
Read only |
Read only |
Read/Write |
Read/Write |
Read only |
Read only |