HP XP P9500 Storage - Manual (Page 96)

7. For Timer Type, specify the type of clock used for consistency time. This option can only be
selected when no journal volume is registered. The selected option must be the same for
primary and secondary systems.
- System, the system clock of the mainframe host is used. The host MVS IOS routine attaches
time-stamp information from the time-of-day (TOD) clock to each write I/O operation. The
time-stamp is transferred to the primary system at the beginning of each I/O operation.
- Local, the mainframe system clock is not used.
- None is available only when copy direction of the pair is reversed, S-VOL-to-P-VOL. With
None, the mainframe system clock is used.
8. Click Set when finished.
9. Review settings in the Preview list in the Journal Operation window.
•
To modify a setting, right click and select Modify.
•
To cancel a setting, right click and select Cancel.
10. Click Apply to apply the settings. If an error occurs, the error code appears in the right-most
column of the Preview list. To view detailed information about the error, right click the error
code and select Error Detail.
Changing options used by mirrors
Most pair operations are performed on multiple pairs. This is done using a journal or mirrors. You
can change the following options that affect the pairs in a mirror:
•
Unit of Path Watch Time—establishes the unit of path watch time.
•
Copy Pace—establishes the pace at which data is copied
•
Path Watch Time—establishes the amount of time before a blocked path results in the mirror
being split
•
Forward Path Watch Time—establishes whether to forward the Path Watch Time value of the
master journal to the restore journal.
•
Transfer Speed—which specifies the speed for data transfer
•
Delta Resync Failure—which specifies the processing that takes place in the event of a failure.
Prerequisite information
Please be aware of the following when changing mirror options:
•
Mirror options can be changed on both primary and secondary systems.
•
To change mirror options, the status of the mirror must be one of the following:
Initial ◦
◦ Active
◦ Stopped
◦ Hold
◦ Holding
◦ Hold(Failure)
•
The Transfer Speed option can be changed if the mirror’s status is Active, Hold, or Holding.
•
When changing options for multiple mirrors, you can leave some options unchanged by
entering or selecting no value. If you specify a value, it is applied to the selected mirrors.
96 Maintaining the system