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Chapter 6 Configuring Journal Groups 6-23
Hitachi Universal Replicator for IBM /OS User’s Guide
Figure 6-6 Suspend Pair Window
The Suspend Pair window displays the following:
• S-VOL Write: Allows you to specify whether hosts can issue read I/O and
write I/O to the secondary data volume after the mirror is split. The default
is Disable.
If you select Enable, hosts can issue read I/O and write I/O to the
secondary data volume after you split the mirror.
If you select Disable, hosts cannot issue read I/O and write I/O to the
secondary data volume after you split the mirror.
This parameter takes effect only when the selected volume is a master
journal group.
• Range: Allows you to specify the split range. This parameter is always set
to Group and cannot be changed.
• Suspend Mode: Allows you to specify how to handle update data that are
not reflected to the secondary data volume. The default is Flush.
– If you select Flush, update data will be reflected to the secondary data
volume when you split the mirror.
When the secondary storage system receives a request for splitting a
mirror, all the journal data (i.e., update data) that the mirror retains
will be written to the secondary data volume. After that, the status of
the mirror will change from Suspending to Suspend if the mirror does
not retain any journal data for a certain period of time.
– If you select Purge, update data will not be reflected to the secondary
data volume when you split the mirror. If you restore the mirror, the
update data will be reflected to the secondary data volume.