HP StorageWorks XP Remote Web Console Software - Manual (Page 216)

6-18 Chapter 6 Configuring Journal Groups
Hitachi Universal Replicator for IBM /OS User’s Guide
– Medium: The speed of the initial copy activity is faster than Low and
slower than High.
If you want to specify Medium, please ensure that the amount of
update I/Os (i.e., write requests from hosts to primary data volumes) is
10 MB/s or less per one parity group. If it exceeds 10 MB/s, data
volume pairs may become split (suspended).
• High: The speed of the initial copy activity is faster than Low and
Medium.
If you want to specify High, please ensure that update I/Os (i.e., write
requests from hosts to primary data volumes) will not occur. If update
I/Os occur, data volume pairs may become split (suspended).
Note : The secondary storage system administrator cannot specify this option.
• Unit of Path Watch Time: Allows you to specify the unit of path watch
time. You can specify one of the following: minute, hour, or day.
• Path Watch Time: Allows you to specify the interval from when a path
gets blocked to when a mirror gets split (suspended).
This value must be within the range of 1 to 59 minutes, 1 to 23 hours, or 1
to 30 days. You can specify a numeric value in Path Watch Time.
Note : Make sure that the same interval is set to both the master and restore
journal groups in the same mirror, unless otherwise required. If the
interval differs between the master and restore journal groups, these
journal groups will not be suspended simultaneously. For example, if the
interval for the master journal group is 5 minutes and the interval for the
restore journal group is 60 minutes, the master journal group will be
suspended in 5 minutes after a path gets blocked, and the restore journal
group will be suspended in 60 minutes after a path gets blocked.
Caution : If the DKCMAIN microprogram version is 50-05-03-00/00 or higher,
the path watch time setting does not take effect because the system option
mode 449 is set to ON at the factory setting. To make the path watch time
setting take effect, please ask the Support Center to set the mode 449 to
OFF.
Note : If you want a mirror to get split (suspended) immediately after a path
gets blocked, please ask the Support Center to set the system option mode
448 to ON and set the system option mode 449 to OFF. For detailed
information about the modes 448 and 449, see Table 6-2.
Table 6-2 System Option Modes
Mode Description
448 ON: If the SVP detects a blocked path, the SVP assumes that an error occurred, and then immediately
splits (suspends) the mirror.
OFF: If the SVP detects a blocked path and the path does not recover within the specified period of time, the
SVP assumes that an error occurred, and then splits (suspends) the mirror.
Note : The mode 448 setting takes effect only when mode 449 is set to OFF.