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8-14 Chapter 8 Performing Pair Operations
Hitachi Universal Replicator for IBM /OS User’s Guide
• R-JNL Group: Indicates the restore journal group.
• Mirror ID: Indicates the mirror ID.
• S/N(CTRL ID) : displays the five-digit serial number and the controller ID
of the secondary storage system. The controller ID is enclosed by
parentheses.
• Initial Copy Priority: Indicates priority (scheduling order) of the initial
copy operations. The value can be within the range of 1 to 256 (disabled
when the status becomes Duplex).
• CFW: Indicates whether to copy cache-fast-write data to the secondary
data volume. The default is Only P-VOL .
– Only P-VOL: Does not copy cache-fast-write data to the secondary
data volume.
– Copy to S-VOL: Copies cache-fast-write data to the secondary data
volume.
• Error Level: Indicates the range used for splitting a pair when a failure
occurs. The default is Group.
– Group: If a failure occurs with a pair, all pairs in the mirror where the
pair belongs will be split.
– Volume: If a failure occurs with a pair, only the pair will be split.
• S-VOL Write: Indicates whether write I/O to the secondary data volume is
enabled or disabled (enabled only when the pair is split).
• Other Information: Displays the following:
– Established Time: Indicates the date and time when the volume pair
was created.
– Updated Time: Indicates the date and time when the volume pair
status was last updated.
– Displays Reverse Resync if "reverse resync" will be performed on the
pair. Displays nothing if "reverse resync" will not be performed on the
pair.
– Consistency Time: Indicates time stamp transferred by the host
computer if the secondary data volume uses the system timer.
Displays the phrase "differs from C/T of the JNL group" if the pair is
split and the consistency time for the secondary data volume does not
match the consistency time for the journal group.
– Timer Type: Indicates the type of timer used by the data volume.
System
The system clock of the mainframe host is used.
Local
The system clock of the SVP is used.
None
No system clock is used.
– SEQCHK: The word SEQCHK is displayed if the secondary data volume
uses the system timer and receives update data without time stamp
from the host computer.