HP XP Racks - Manual (Page 70)

Table 14 Copy pair conditions for Compatible FlashCopy linkage (continued)
Copy pair status when linked with Compatible FlashCopy Differential-data
management unit
1
Copy type
When using the Preserve Mirror function, however, the copy pair must
be in the DUPLEX status.
Suspend status CYL TrueCopy
Asynchronous
Suspend status TRK
for
Mainframe
Either of the following: Cannot be set Continuous
Access
Journal Z
◦
DUPLEX status 3
◦
Suspend status
1
The differential-data management unit is specified in DIF UNIT in the Copy Group Attributes panel. For details about
the differential-data management unit, see the explanation of the Copy Group Attributes panel in the HP XP7 for
Business Continuity Manager Reference Guide.
2
Copy groups with consistency group IDs are not supported.
3 A 3DC Multi-Target (Cnt Ac-S Z x Cnt Ac-J Z) configuration cannot be linked with Compatible FlashCopy when
both the Continuous Access Synchronous Z and Continuous Access Journal Z copy pairs are in the DUPLEX status.
To link a 3DC Multi-Target (Cnt Ac-S Z x Cnt Ac-J Z) configuration with Compatible FlashCopy, suspend either the
Continuous Access Synchronous Z or Continuous Access Journal Z copy pair.
4 Depending on the storage system model and whether the Continuous Access Synchronous Z Consistency Preservation
Function is used, Compatible FlashCopy linkage might not be possible in the DUPLEX status. For details, see the
manual for your storage system.
•
Using the Remote DKC Control function to obtain the copy status is not supported.
•
When Continuous Access Journal Z is linked with Compatible FlashCopy, the following functions
might not operate correctly because the timestamp information assigned to the I/O is not
inherited:
◦ Consistency Preservation Function in a 4x4 configuration
◦ Cnt Ac-J Z ATTIME suspend function
•
Table 15 (page 70) lists Continuous Access Synchronous Z copy group attributes which can
be set when using the Preserve Mirror function.
Table 15 Continuous Access Synchronous Z copy group attributes that can be set when using
the Preserve Mirror function
Description Possibility of the setting Items displayed on the Copy Group
Attributes panel
Specifies the specification of
consistency group IDs. N C/T ID
Specifies how to handle the P-VOL
after suspension (fence level). Y FENCE LVL
Specifies whether to freeze the
storage system when a failure
suspension (SUSPER) occurs. Y FREEZE SCP
Specifies whether to forward the
writing timestamp to the S-VOL
(timestamp transfer mode). Y TIMESTAMP
70 Business Continuity Manager with replication products