HP StorageWorks XP Remote Web Console Software - Manual (Page 111)

Figure 44 System Option Dialog Box
The Maximum Initial Copy Activities setting specifies the number of concurrent initial copy and
resync operations. You can set a number from 1 to 512. The default setting is 64 volumes. XP
Continuous Access initial copy activities can impact the performance of the main site, depending
on the amount of I/O activity and the number of pairs being registered at the same time. If this
value is too large, pending processes in the remote site will increase and it may impact the remote
I/O response time to the update I/Os.
For example, if you set the maximum initial copy activities to 64 volumes and then add 65 XP
Continuous Access pairs at the same time, the MCU starts the first 64 pairs and will not start the
65th pair until one of the first 64 pairs is synchronized (Duplex or PAIR status). When you change
the maximum initial copy activities setting, the new setting applies to pairs created or resynchronized
after the setting was changed, not to existing pairs.
The Maximum Initial Copy Activities (CU) setting specifies whether the CU-by-CU setting of concurrent
initial copy and resync operations will be 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
setting (see
“Changing the Option Settings of CUs” (page 111) ).
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 Path Blockade SIM Watch (sec.) setting specifies the time for monitoring SIMs that are reported
when 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.
Other Operations 111