|
Pair status (CCI/BCM) |
Description |
Host status |
P-VOL access |
S-VOL access |
|---|---|---|---|---|
|
SMPP4/TRANS |
The pair is in the process of being deleted. In this state, pair operations are not possible. When the deletion is complete, the pair volumes become simplex volumes. |
P-VOL = SIMPLEX S-VOL = SIMPLEX |
Read/write disabled1, 3 |
Read/write disabled 1 |
|
CPPD4/PENDING |
Creation of a pair is performed, and the initial copy is being executed2. The system continues to accept Read/Write operations on the primary volume, but Write operations on the secondary volume is prohibited. |
P-VOL = PPRI-PNDG S-VOL = PSEC-PNDG |
Read/write enabled |
Read/write disabled 1 |
|
PAIR/DUPLEX |
The initial copy operation is complete and the volumes are paired. Update copy from the P-VOL to the S-VOL is performed. Even if the pair status is PAIR/DUPLEX, the P-VOL and S_VOL are not necessarily synchronized. |
P-VOL = PPRIMARY S-VOL = PSECONDRY |
Read/write enabled |
Read/write disabled 1 |
| COPY/TRANS |
The pair split operation begins in normal mode (Steady Split), and the pair is in the process of being split.2 The differential data of the primary volume is copied to the secondary volume. When the differential copy is complete, the pair is split. The data on the split secondary volume is the same as on the primary volume at the time the pair is split. |
P-VOL = PPRI-PNDG S-VOL = PSEC-PNDG |
Read/write enabled |
Read/write disabled 1 |
| PSUP4, 5/SUSPVS |
The pair split operation begins in fast mode (Quick Split) and the pair is being split.2 In the background, the differential data is copied from the primary volume to the secondary volume. You cannot delete a pair in PSUP/SUSPVS status. |
P-VOL = PPRI-SUSP S-VOL = SIMPLEX |
Read/write enabled |
Read/write enabled |
| PSUS(or SSUS)6/SUSPOP |
The pair is split. The storage system stops running update copy. Write operations can now be performed on the S-VOL. When the pair is in the PSUS(or SSUS)/SUSPOP status, the differential data between the P-VOL and S-VOL is saved, so that the pair volumes can be quickly resynchronized later. |
P-VOL = PPRI-SUSP S-VOL = SIMPLEX |
Read/write enabled |
Read/write enabled |
| CPRS4/PENDING |
The pair resync operation begins, and the pair volumes are being copied by the resync operation.2 Write I/O operations to the S-VOL in CPRS/PENDING status are rejected. If the split pair is resynchronized in normal mode, only the differential data of the P-VOL is copied to the S-VOL. If a pair in PSUE/SUSPER status is resynchronized, the entire P-VOL is copied to the S-VOL. |
P-VOL = PPRI-PNDG S-VOL = PSEC-PNDG |
Read/write enabled |
Read/write disabled 1 |
| RCPY/REVRSY |
The reverse resync operation begins, and the pair volumes are being copied by the resync operation.2 Write I/O operations on the S-VOL in RCPY/REVRSY status are rejected. Only the differential data of the S-VOL is copied to the P-VOL. During a reverse resync operation or resync operation in Quick Restore mode for VSP One B85 or during a reverse resync operation for VSP One B20 series, update copy is not performed. |
P-VOL = PPRI-PNDG S-VOL = PSEC-PNDG |
Read only1 |
Read/write disabled 1 |
| PSUE/SUSPER |
The pair has been suspended by the storage system. The storage system continues to accept host update requests to the P-VOL. Update copy to the S-VOL is stopped. The storage system marks the entire P-VOL as differential data, resynchronizes the suspended pair, and copies the entire P-VOL to the S-VOL. |
P-VOL = PPRI-SUSP S-VOL = PSEC-SUSP |
Read/write enabled |
Read/write disabled 1 |
|
Notes:
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