Software Owner's manual

Chapter 6 Configuring Journal Groups 6-19
Hitachi Universal Replicator for IBM /OS User’s Guide
449 ON: The SVP does not detect blocked paths.
OFF: The SVP detects blocked paths and monitors the time until the mirrors get split (suspended).
• Forward Path Watch Time: Allows you to specify whether to forward the
Path Watch Time value of the master journal group to the restore journal
group. If the Path Watch Time value is forwarded from the master journal
group to the restore journal group, the two journal groups will have the
same Path Watch Time value.
– Yes: The Path Watch Time value will be forwarded to the restore
journal group.
– No: The Path Watch Time value will not be forwarded to the restore
journal group. No is the default.
– Blank: The current setting of Forward Path Watch Time will remain
unchanged.
Caution:
This option cannot be specified in the secondary site.
Select Yes in the primary site of URz pair for delta resync operation
since you need to set path watch time in the secondary site to perform
delta resync operation.
• Use of Cache: Allows you to specify whether to store journal data in the
restore journal group into the cache.
– Use: Journal data will be stored into the cache.
Note: 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.
– Blank: The current setting of Use of Cache will remain unchanged.
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.
• Speed of Line: Allows you to specify the line speed of data transfer. The
unit is Mbps (megabits per second).
You can specify one of the following: 256, 100, or 10.
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.
• Delta resync Failure: Allows you to specify the processing that would
take place when delta resync operation cannot be performed.