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Prerequisites and best practices for pair creation
•
Both arrays must be able to communicate with each other via their
respective controller 0 and controller 1 ports.
•
Bandwidth for the remote path must be known.
•
Local and remote arrays must be able to communicate with the Hitachi
Storage Navigator 2 server, which manages the arrays.
•
Logical units must be set up and formatted on the remote array for the
secondary volume or volumes.
-
You will be required to enter the LUN for the S-VOL if using the
Create Pair procedure (S-VOL LUs are automatically selected by
the setup wizard).
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In the Create Pair procedure, the LUN for the S-VOL must be the
same as the corresponding P-VOL's LUN.
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Block size of the S-VOL must be the same as the P-VOL.
•
Two data pools must be set up on the local array and two on the remote
array. You will be required to enter the LUN for the remote data pools.
•
DMLUs must be set up on both arrays.
•
The remote array ID is required during both initial copy procedures.
This is listed on the highest-level GUI screen for the array.
•
The create pair and resynchronize operations affect performance on the
host. Best practice is to perform the operation when I/O load is light.
•
For bi-directional pairs (host applications at the local and remote sites
write to P-VOLs on the respective arrays), creating or resynchronizing
pairs may be performed at the same time. However, best practice is to
perform the operations one at a time to lower performance impact.
•
Confirm that the state of the remote path is Normal before doing a
pair operation. If you perform a pair operation when a remote path is
not set up, or its state is Diagnosing or Blocked, the pair operation may
not complete correctly
•
When you change the remote array to a different array, ensure that you
have deleted all the TrueCopy pairs and the remote path before
changing the remote array.
TCE setup wizard
To create a pair using the backup wizard
1. In Navigator 2 GUI, select the local array then click the Show &
Configure Array button.
2. If Password Protection is installed and enabled, log in with the registered
user ID and password for the array.
3. On the array page under Common Array Tasks, click the TrueCopy
Extended Distance link. The TrueCopy Extended Distance Setup
Wizard opens.
4. Review the Introduction screen, the click Next. The Setup Remote Path
screen displays.
7–4
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
Pair operations
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Troubleshooting
