HP StorageWorks XP Remote Web Console Software - Manual (Page 101)

Continuous Access XP Journal user guide 101
• Medium: Speed of initial copy activity is faster than Low and slower than High.
To specify Medium, ensure that the amount of update I/Os (that is, write requests from hosts to
primary data volumes) is 10 MB/s or less per parity group. If it exceeds 10 MB/s, data volume
pairs might become split (suspended).
• High: Speed of initial copy activity is faster than Low and Medium.
To specify High, ensure that update I/Os (that is, write requests from hosts to primary data volumes)
do not occur. If update I/Os occur, data volume pairs might become split (suspended).
NOTE: Secondary disk array administrators cannot specify this option.
• Path Watch Time (1 to 60 min): Interval from when a path is blocked to when a mirror is split
(suspended).
This value must be from 1 to 60 minutes.
NOTE: Set the same interval for the master and restore journal groups in the same mirror unless
otherwise requested. If the interval differs between the master and restore journal groups, these
journal groups are not suspended simultaneously. For example, if the master journal group’s interval
is 5 minutes and the restore journal group’s interval is 60 minutes, the master journal group is
suspended 5 minutes after a path is blocked and the restore journal group is suspended 60 minutes
after a path is blocked.
CAUTION: If the DKCMAIN microprogram version is 50-05-03-00/00 or later, the Path Watch
Time setting does not take effect because SVP mode 449 is set to ON at the factory setting. To
make the Path Watch Time setting take effect, contact your HP account support representative to set
mode 449 to OFF.
NOTE: To split a mirror (suspend) immediately after a path is blocked, contact your HP account
support representative to set SVP modes 448 and 449 to OFF. For more information about modes
448 and 449, see Table 26 .
Table 26 SVP modes
Mode Description
448 ON: If SVP detects a blocked path, SVP assumes an error occurred, and immediately splits (suspends)
the mirror.
OFF: If SVP detects a blocked path and the path does not recover within the specified time period,
SVP assumes an error occurred, and splits (suspends) the mirror.
NOTE: The mode 488 setting takes effect only when mode 499 is set to OFF.
449 ON: SVP does not detect blocked paths.
OFF: SVP detects blocked paths and monitors the time until the mirrors are split (suspended).
NOTE: Mode 449 is OFF by default for DKCMAIN versions earlier than
50-05-03-00/00, and is ON by default for DKCMAIN microprogram versions
50-05-03-00/00 or later. If the DKCMAIN microprogram of the XP10000/XP12000 is
upgraded from earlier than 50-05-03-00/00 to 50-05-03-00/00 or later, the default value
of mode 449 remains OFF.