Hitachi Universal Replicator for z/OS User Guide: HP XP12000 Disk Array, HP XP10000 Disk Array, HP 200 Storage Virtualization System (T1778-96021, May 2011)

• Use of Cache: Indicates whether to store journal data in the restore journal group into the
cache.
◦ Use: Journal data will be stored into the cache. When there is insufficient space in the
cache, journal data will also be stored into the journal volume.
◦ Not Use: Journal data will not be stored into the cache.
CAUTION: This setting does not take effect on master journal groups. However, if the
Business Continuity Manager YKRESYNC REVERSE command is used to change a master
journal group into a restore journal group, this setting will take effect on the journal group. If
you set Use, this setting only takes effect on the journal volumes of RAID-5 or RAID-6 that are
in the journal group. For external volumes, non-RAID-5 journal volumes, and non-RAID-6 journal
volumes, Use works the same as Not Use.
• Delta resync Failure: Indicates the processing that would take place when delta resync operation
cannot be performed.
◦ Entire: Whole data in primary data volume will be copied to secondary data volume
when delta resync operation cannot be performed.
◦ None: No processing will take place when delta resync operation cannot be performed.
Therefore, the secondary data volume will not be updated.
• Speed of Line: Indicates the line speed of data transfer. The unit is Mbps (megabits per second).
One of the following is displayed: 256, 100, or 10.
The recommended setting values are as follows:
◦ 10 is recommended if the line speed is from 10 Mbps to 99 Mbps.
◦ 100 is recommended if the line speed is from 100 Mbps to 255 Mbps.
◦ 256 is recommended if the line speed is 256 Mbps and more.
CAUTION: This setting does not take effect on master journal groups. However, if the Business
Continuity Manager YKRESYNC REVERSE command is used to change a master journal group
into a restore journal group, this setting will take effect on the journal group.
• Timer Type: Indicates the type of clock used for consistency time.
System: The system clock of the mainframe host is used.◦
◦ Local: The system clock is not used.
◦ None: The system clock of the mainframe host is used. The difference between System
and None is explained in Timer Type Option.
• EXCTG, DKC/CTRLID: Displays the following information sequentially if the journal group
belongs to an extended consistency group:
◦ the extended consistency group number
◦ the serial number and the LDKC number (the LDKC number is enclosed by parentheses)
◦ A slash (/), the controller ID
This column is blank if the journal group does not belong to any extended consistency group.
• JNL Volumes: Displays a list of registered journal volumes.
Parity Group: indicates the parity group where a journal volume belongs.◦
◦ LDKC:CU:LDEV: Indicates the LDKC number, the CU number and the LDEV number of a
journal volume.
Displaying Detailed Information about a Journal Group 125