• The following table lists Continuous Access Synchronous copy group attributes which can be
set when using the Preserve Mirror function.
Table 10 Cnt Ac-S copy group attributes which can be set when using the Preserve Mirror
function
DescriptionPossibility of the settingItems displayed on the Copy Group
Attributes panel
Specifies the specification of
consistency group IDs.
NC/T ID
Specifies how to handle the P-VOL
after suspension. (fence level).
YFENCE LVL
Specifies whether to freeze the
storage system when a failure
suspension (SUSPER) occurs.
YFREEZE SCP
Specifies whether to forward the
writing timestamp to the S-VOL
(timestamp transfer mode).
YTIMESTAMP
Specifies the differential-data
management unit.
Can be set to only TRK .DIF UNIT
Specifies whether to use the
Open/MF Consistency Preservation
Function.
NOPEN/MF
Legend: Y: Can be set; N: Cannot be set
• Configurations cannot be created in which Continuous Access Synchronous copy pairs that
use the Preserve Mirror function are combined with other copy pairs.
Sample replication product combinations
Different replication products can be used concurrently for the same volume. Figure 27 (page 57)
through Figure 31 (page 58) give examples of basic replication product combinations.
Figure 27 A 3DC Cascade configuration combination
Figure 28 A 3DC Multi-target configuration combination
Sample replication product combinations 57
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