HP XP7 Storage - Manual (Page 137)

Table 12 Volume types that can be shared with Cnt Ac-J Z (continued)
Used as Cnt Ac-J Z
journal volume? Used as Cnt Ac-J Z
S-VOL? Used as Cnt Ac-J Z
P-VOL? Volumes types and functions
5. See the topic on interoperability with other products and functions in the HP XP7 for Compatible FlashCopy Mirroring
User Guide for more information.
6. When a THP V-VOL is used as a pair volume shared by Business Copy Z and Cnt Ac-J Z, the Cnt Ac-J Z create pair
operation can fail. For more information on how to ensure against failure, see the bullet on THP V-VOLs and Business
Copy in
“Thin Provisioning Z ” (page 138) .
The following topics clarify key information regarding shared volumes.
NOTE: Continuous Access Synchronous Z and Business Copy Z volumes are used extensively
with Continuous Access Journal Z. See “Configurations with Continuous Access Synchronous Z”
(page 141) and “Configurations with Business Copy Z” (page 152) for more information.
Cache Residency Z
•
CR Z volumes can be used as Continuous Access Journal Z pair’s P-VOLs and S-VOLs.
•
You can perform CR Z operations on a Continuous Access Journal Z pair’s P-VOL and S-VOL.
•
CR Z volumes cannot be used as journal volumes.
Compatible FlashCopy
Cnt Ac-J Z P-VOLs can be shared with Compatible FlashCopy (FC Z) S-VOLs and T-VOLs.
To create the relationship with FC Z, specify the following options:
•
DFSMSdss:FCTOPPRCPRIMARY
•
TSO:TGTPPRIM(YES)
•
ICKDSF:TGTOKASPPRCPRIM(YES)
•
ANTRQST Macro:TGTPPRIM(YES)
Cautions
•
Cnt Ac-J Z copy rate may lower when FC Z copy processing takes place. The impact of FC Z
operations on the Cnt Ac-J Z pair can be increased or decreased depending on Cnt Ac-J Z
copy range and copy pace, and the order of FC Z copy processing.
•
Data that FC Z copies to Cnt Ac-J Z P-VOLs are transferred to Cnt Ac-J Z S-VOLs asynchronously.
Cnt Ac-J Z displays the progress of this asynchronous data transfer. Depending on the timing
of the FC Z and Cnt Ac-J Z copy operations, a time delay may occur between the FC Z copy
operation and the Cnt Ac-J Z copy operation, and the Cnt Ac-J Z asynchronous data transfer
may progress slowly
•
The time stamp function cannot be used while an FC Z copy operation is being performed.
•
The FC Z relationship can be created in the status under which the Cnt Ac-J Z initial copy
operation can be performed. If the P-VOL of the Cnt Ac-J Z pair with Duplex or Pending Duplex
status is assigned to the T-VOL of the FC Z relationship, the Cnt Ac-J Z initial copy operation
is performed. However, if the FC Z relationship is created in the status under which the Cnt
Ac-J Z initial copy operation cannot be performed, the Cnt Ac-J Z pair may be suspended.
The initial copy operation cannot be performed in the following statuses:
◦ Both primary system cache and secondary system cache are blocked.
◦ Shared memory is blocked.
◦ The M-R path is blocked.
Cache Residency Z 137