Hp XP P9500 Storage User Manual Page 152

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The primary site requires the following:
Host application
Cnt Ac-S
Cnt Ac-S P-VOL, the primary production volume.
The intermediate site requires the following:
Cnt Ac-S
Cnt Ac-J
Cnt Ac-S S-VOL = Cnt Ac-J P-VOL
Cnt Ac-J master journal volume
Use a journal that was registered when 2DC Cascade was set to Enable in the Edit Journal
Volumes dialog box. With it you specify whether to write Cnt Ac-S P-VOL data to a shared
Cnt Ac-S S-VOL/Cnt Ac-J P-VOL, or to write only to the Cnt Ac-J master journal.
Enable — Data will be written only to Cnt Ac-J master journal volume on the intermediate
site for use in the 2DC configuration.
Disable — Data will be written to the shared Cnt Ac-S S-VOL/Cnt Ac-J P-VOL on the
intermediate site.
Updates to the Cnt Ac-S S-VOL/Cnt Ac-J P-VOL is prohibited.
System option mode 707 must be set to ON. This allows Cnt Ac-S P-VOL data to be
written directly to the Cnt Ac-J master journal and not to the shared Cnt Ac-S S-VOL/Cnt
Ac-J P-VOL.
- Though it is possible to change option mode 707, the change is not reflected in the
system. You need to delete the journal then re-register it with the option mode set to ON.
- Remote Web Console does not show system option 707. Therefore, it is recommended
that all journals in the system have the same system option mode 707 setting.
The remote site requires the following:
Cnt Ac-J
Cnt Ac-J S-VOL
Cnt Ac-J remote journal volume
Specifications and restrictions for Continuous Access Journal pair operations
Because the Cnt Ac-J pair depends on the Cnt Ac-S pair for data, data copying is not executed
when the Cnt Ac-J pair is created, but when the Cnt Ac-S pair is created.
About resynchronizing a Cnt Ac-J pair:
The Cnt Ac-S S-VOL must be in PSUS or PSUE status (Error Level field = Group).
Make sure the Cnt Ac-J S-VOL is not in SSWS status when resynchronizing with -swaps
or -swapp options.
If the Cnt Ac-J pair is suspended and in SSWS status, execute the Pairsplit RB command
on the Cnt Ac-J S-VOL, confirm that status becomes PSUS, then re-synchronize the pair
from the primary site.
152 Configurations with Continuous Access Synchronous
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