Table 27 svp modes, 27 svp modes – HP StorageWorks XP Remote Web Console Software User Manual

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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 array administrators cannot specify this option.

•

Path Watch Time (1 to 60 min): Interval beginning when a path is blocked and ending when a mirror

is split (suspended).
This value must be from 1 to 60 minutes.

NOTE:

Ensure that the same interval is set 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 (suspend) a mirror immediately after a path is blocked, contact your HP account

support representative to set SVP mode 448 to ON and set SVP mode 449 to OFF. For more

information about modes 448 and 449, see

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 448 setting takes effect only when mode 449 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 your array 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.