The following table shows the transitions for pair status and I/O mode, the volumes that are accessible from the server, and the location of the latest data when you can no longer use the S-VOL due to LDEV blockade.
Before failure |
After failure |
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|---|---|---|---|---|---|---|
Pair status and I/O mode |
Pair status and I/O mode |
Volume accessible from the server |
Volume with latest data |
|||
P-VOL |
S-VOL |
P-VOL |
S-VOL |
P-VOL |
S-VOL |
|
PAIR (Mirror (RL)) |
PAIR (Mirror (RL)) |
PSUE (Local) |
PSUE (Block) |
OK |
NG |
P-VOL |
PAIR (Mirror (RL)) |
PAIR (Block) |
PSUE (Local) |
PSUE (Block) |
OK |
NG |
P-VOL |
COPY (Mirror (RL)) |
COPY (Block) |
PSUE (Local) |
PSUE (Block) |
OK |
NG |
P-VOL |
PSUS/PSUE (Local) |
SSUS/PSUE (Block) |
PSUS/PSUE (Local) |
SSUS/PSUE (Block) |
OK |
NG |
P-VOL |
PSUS/PSUE (Block) |
SSWS (Local) |
PSUS/PSUE (Block) |
SSWS (Local) |
NG |
NG |
None* |
* Recover data using the P-VOL data that is not the latest, ShadowImage, Thin Image, Thin Image Advanced, or other backup data. |
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SIMs
- Primary storage system: DD1xyy
- Secondary storage system: 3A0xyy, DB8xxx, DB9xxx, DBAxxx, DBBxxx, DD1xyy, DFAxxx, DFBxxx, EF8xxx, EF9xxx