The table below shows the changes in the pair status before and after a failure.
| Pair type | Pair status before failure | Pair status after failure | ||
|---|---|---|---|---|
| P-VOL | S-VOL | P-VOL | S-VOL | |
| GAD pair | COPY (Local) | COPY (Block) | COPY (Local) | COPY (Block) |
| Source UR pair | PAIR | PAIR | PAIR1 or PSUE1, 2 | - (PSUE2) |
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Note:
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When recovering from this failure, recover the source UR secondary site, and then restore the source UR pair because I/Os from the servers continue at the source UR site even after the failure occurs.