Note: When using virtual storage machine volumes, make sure to
specify the physical serial number of the storage system, not the
serial number of the virtual storage machine.
5. In the Remote Paths box, specify the following:
a. For Path Group ID, select the path group ID (00-FF). A storage
system can have a maximum of 64 registered path group IDs.
b. For Minimum Number of Paths, select the minimum number of
paths between the secondary and primary system. If the number of
paths drops below the minimum, the primary system splits the pair.
The maximum is 8; the default is 1.
c. For Select Type, select the port type, and then select the port to be
used for both the local storage system and the remote storage
system. If you select iSCSI, enter the IP address and the TCP port
number for the remote storage system port. You can add more paths
by clicking the Add Path button. You can also add and delete paths in
the Add Remote Paths window if necessary.
6. Click Options to access additional settings, which are optional.
a. For RIO MIH Time, enter an interval in seconds that, if exceeded,
causes the data-transfer operation to be reported as failed by the
system. Values range from 10 seconds to 100 seconds; 15 is the
default. RIO MIH means "remote I/O missing interrupt handler".
b. For Round Trip Time, enter a time limit for data copy from P-VOL to
S-VOL. Range is 1-500 milliseconds.
7. Click Finish.
8. In the Confirm window, review the settings and enter a task name in the
Task Name box.
9. Click Apply to save your settings in the system.
Changing remote replica options
You can specify the following options that affect the TC system. These options
can be set at any time (before or after the initial copy).
• The number of volumes that are copied concurrently during the initial
copy. Find related information in
Priority for initial copy operations and
scheduling order on page 3-15.
• The amount of time the system monitors for blocked paths.
• The amount of time the system monitors for path-watch related SIMs.
Note: If iSCSI is used in a remote path, the Blocked Path Monitoring remote
replica option must be set to at least 40 seconds (default). If Blocked Path
Monitoring is less than 40 seconds, the path might be blocked due to a delay
in the network such as many switches in a spanning tree protocol (STP)
network or a long distance connection.
5-4
TC configuration
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
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