Creating pairs
When you create a pair, all data in the P-VOL on the primary system is copied
to the S-VOL on the secondary system. The P-VOL remains available to the
host for I/O operations during the initial copy operation.
Prerequisite information
• You must create pairs from the primary system.
• S-VOLs must be offline to all hosts.
• Ports must be configured for TrueCopy.
• The primary and secondary systems must be configured for TrueCopy.
See Adding remote connections on page 5-2 for more information.
• The logical units on the primary and secondary storage systems must be
defined and formatted prior to pairing.
• The P-VOL capacity and S-VOL capacity must be the same size (same
number of blocks). To view the capacity in blocks, click Options >
Capacity Unit > block in the Logical Devices window. If the capacity is
displayed in GB or TB, a slight difference in P-VOL and S-VOL capacity
might not be displayed.
• Stop Performance Monitor before the initial copy to avoid overloading with
TCP/IP traffic.
• During this operation, you select P-VOLs and S-VOLs by Port ID, Host
Group ID or iSCSI target ID and LUN.
• During this operation, you can specify multiple P-VOLs to be paired, but
only one S-VOL. To plan how the system assigns subsequent S-VOLs, see
the bullet, "When creating multiple pairs concurrently...." in
Pair volume
requirements and recommendations on page 3-9.
• During this operation, you can specify whether to fence the P-VOL when
an error occurs. This is discussed in detail in Allowing I/O to the P-VOL
after a split—Fence Level options on page 3-10.
• During this operation, you can specify the priority for initial copy
operations. When performing more initial copies than specified for
Maximum Initial Copy Activities (during configuration), see the discussion
in
Priority for initial copy operations and scheduling order on page 3-15.
Procedure
1. Open the Remote Replication window.
In Hitachi Command Suite:
a. On the Resources tab, expand the Storage Systems tree.
b. Right-click the target storage system, and click Remote Replication.
In Device Manager - Storage Navigator:
a. Click Storage Systems, and then expand the Storage Systems
tree.
b. In the Storage Systems tree, click Replication > Remote
Replication.
TC pair operations
6-3
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
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