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)

◦ In Journal group 3, the latest time stamp is 15:03.
◦ In Journal group 4, the latest time stamp is 15:04.
2. URz searches for the oldest time stamp from the ones identified in step 1 and restores
data up to that time to the secondary volumes.
In the example shown in Figure 18 (page 60), the oldest time stamp is 15:00. URz restores
all data that have a time stamp 15:00 or earlier to the secondary data volumes.
◦ For Journal group 1, URz restores all data up to 15:00.
◦ For Journal group 2, URz restores all data up to 14:02.
◦ For Journal group 3, URz restores all data up to 14:03.
◦ For Journal group 4, URz restores all data up to 14:04.
Figure 18 Time Stamps of Data that Have Not Been Restored to Secondary Data
Volumes
• Consistency time:
In the URz windows, consistency times of extended consistency groups, journal groups, and
data volume pairs are displayed. These consistency times have the following meanings:
◦ The consistency time of an extended consistency group is the latest time stamp of the
restored data in the group in which consistency is guaranteed.
In the example shown in Figure 18 (page 60), the consistency time of the extended
consistency group is 15:00.
◦ The consistency time of a journal group is the latest time stamp of the restored data.
In the example shown in “Time Stamps of Data that Have Not Been Restored to Secondary
Data Volumes” (page 60), the consistency times of journal groups 1 to 4 are as follows:
– The consistency time of Journal group 1 is 15:00.
– The consistency time of Journal group 2 is 14:02.
60 Requirements and Restrictions for Universal Replicator z/OS Operations