HP StorageWorks XP24000 Continuous Access Software User and Reference Guide, v01 (T5278-96002, June 2007)

• To change the settings, right-click the preview list, click Modify, make the desired changes,
and
close the dialog box. The preview list displays the updated information.
• To omit the settings, right-click the preview list, and clic k Delete. The changes are cancelled.
• To cancel all operations, select all the operations i n the preview list, right-click, and click the
Delete command, or click the Cancel button. The changes are cancelled.
6. To apply the settings, click Apply.
If an
error oc curs i n the setting, an error code is displayed in the Error Code column in the
preview list. To display the error message, right-click on the list, display the pop-up menu, and
click Error D etail. After you check the error message, click the OK button to close the error
message. If necessary, remove the cause of the error message.
Figure 39 System O ption Dialog Box
The M aximum Initial Copy Activities setting specifies the number of concurrent initial copy o perations.
You can set a number from 1 to 512. The default setting is 64 volumes. Continuous Access initial copy
activities can impact the performance of the main storage system, depending on the amount of I/O a ctivity
and the num ber of pairs being registered at the same time. The maximum initial copy activities setting
of 64
volumes allows you to limit the impact of initial copy activities on storage system performance.
For example, if you set the maximum initial copy activities to 64 volumes and then add 65 Continuous
Access pairs at the sam e time, the MCU star ts the first 64 pairs and will not start the 65th pair until one
of the
fi
rst 64 pairs is synchronized (Duplex status). When you change the maximum initial copy activities
settin
g, the new setting applies to pairs created after the setting was changed, not to existing pairs.
The Ma
ximum I nitial Copy Activities (CU) setting specifies whether the CU-by-CU setting of c oncurrent
initi
al
copy operations will b e enabled or disabled. If it is enabled, you can specify the CU-by-CU
setting of concurrent initial copy operations. If it is disabled, you cannot specify the set ting (see
“Changing the Option Settings of CUs” on page 94).
The Path Blockade Watch (sec.) setting specifies the time for monitoring blockade in the paths. The path
blockade watch value must be from 2 to 45 seconds. The default setting is 40 seconds.
The Pat h Blockade SI M Watch (sec.) setting specifies thetimefor monitoring SIMs that arereportedwhen
paths are blocked. The path blockade SIM watch value must be from 2 to 100 seconds. The default
setting
is 70 seconds. The value of the Path Blockade SIM Watch cannot be smaller than the value
of the
Path Blockade Watch.
Changing the Option Settings of CUs
The information about the CU option settings is displayed if you select CU Option from the tree on
the
System Option window .
94
Performing Continuous Access Configuration Operations