Adding consistency groups (add ct group), Figure 57 add ct group window, 57 add ct group window – HP StorageWorks XP Remote Web Console Software User Manual
Page 98: Adding consistency groups, Add ct group), Adding, Consistency groups (add ct group), Adding consistency, Groups (add ct group)
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TrueCopy for the XP128/XP1024/XP10000/XP12000
Adding Consistency Groups (Add CT Group)
The Add CT Group command adds a consistency group to the connected MCU. When the Add CT Group
command is selected, the Add CT Group window is displayed. Use the Add CT Group window to select
the group options for the group.
Figure 57
Add CT Group window
Use the Timer Type box to select the timer type option for the group.
•
System = system timer (CPU TOD clock) provided by the I/O time-stamping function.
•
Local = local timer (internal MCU TOD clock).
•
None = system timer (CPU TOD clock) provided by the I/O time-stamping function. This timer type
should be selected only when establishing TC390A pairs in the reverse direction (to copy from the
secondary site back to the primary site). When None is selected, the MCU still acquires the time-stamp
information from the host I/O time-stamping function.
Use the MCU-RCU Path box to select the port type (Fibre) for the remote copy connections.
Use the Time Out (Copy Pending) (min.) box to select the maximum delay allowed for TC390A copy (none
or from 3 to 15 min., none = no timeout for TC390A copy pending). The default setting is five minutes. If
the delay between the TC390A M-VOL update and the corresponding R-VOL update reaches the specified
time, the RCU will suspend all R-VOLs in the group. A timeout occurs when the RCU was not able to settle
a recordset within the specified time, or when the RCU has not had any communication from one of the
MCUs in the group within the specified time.
NOTE:
The copy pending timeout value should be less than the I/O timeout value of the host system.
CAUTION:
For instructions on selecting the correct Time Out (Copy Pending) setting for your operational
environment, see
below.
Use the Time Out (RCU Ready) (min.) box to select the maximum delay allowed for re-establishing
MCU-RCU communications following MCU power-off (none or from 0 to 10 min., 0 = no timeout for
TC390A RCU ready). The default setting is five minutes. If the MCU is not able to re-establish
communication with the RCU within the specified time, the MCU suspends all M-VOLs in the group.
The Cancel button cancels the settings you made. The Set button sets the consistency group options you
changed.