Restoring a mirror (pairresync – HP StorageWorks XP Remote Web Console Software User Manual
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Figure 77 Pairsplit-r Window
The Pairsplit-r window shows the following:
•
S-VOL Write: 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.
•
Range: Specify the split range. This parameter is always set to Group and cannot be changed.
•
Suspend Mode: Specify how to handle update data that is not reflected to the secondary data
volume. The default is Flush.
◦
If you select Flush, update data is 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 (that is, update data) that the mirror retains is written to the secondary data volume.
After that, the status of the mirror changes from Suspending to PSUS if the mirror does
not retain any journal data for a certain period of time.
◦
If you select Purge, update data is not reflected to the secondary data volume when you
split the mirror. If you restore the mirror, the update data is reflected to the secondary
data volume.
Restoring a Mirror (Pairresync: Resuming a Copy Operation)
A mirror is a combination of a master journal group and a restore journal group. If you split a
mirror, the copying of data from the master journal group to the restore journal group is suspended.
To restart the copying of data, you need to restore the mirror. When a mirror is in Hold status, you
need to restore the mirror to restart the copying of data.
To restore a mirror, follow the procedure described in this section. Only the primary storage system
administrator can perform this operation; the secondary storage system administrator cannot
perform this operation. However, use RAID Manager to restore a mirror when the consistency
group contains multiple journal groups (see ???, ???, and ???). The configuration of multiple journal
groups for one consistency group is only allowed in the system that consists of multiple primary
and secondary storage systems (see
“Configuration Example of Multiple Storage Systems
). Because Remote Web Console does not support the system that consists
of multiple primary and secondary storage systems, an error occurs if you try to restore a mirror
by using Remote Web Console in this system configuration.
Restoring a Mirror (Pairresync: Resuming a Copy Operation)
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