HP StorageWorks XP Remote Web Console Software - Manual (Page 119)

Timer Type: allows you 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 only be selected when establishing TrueCopy for Mainframe Asynchronous 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.
NOTE: When using TCzA under a Fujitsu OS environment, select Localfor the Timer Type.
MCU-RCU Path: indicates the path type (fibre) for the remote copy connections. Currently, you can
not change the path type.
Offloading Timer (min.): allows you to specify the amount of time for monitoring to transfer data
to a sidefile between 0 and 20 minutes in one second increment. The default setting is 5 minutes.
Enable Inflow Control: allows you to enable the inflow control. To enable the inflow control, click
check box. By default, the check box is selected. Before changing this option, you should release
or suspend pairs in the selected consistency group.
If you use Business Continuity Manager, see the HP XP for Business Continuity Manager Software
User's Guide and see explanations about Set Copy Group Attributes and FLOW CTL. If you use
PPRC, see information about NO DELAY options that are available in PPRC operations.
Time Out (Copy Pending) (min.): allows you to select the maximum delay allowed for TrueCopy for
Mainframe Async copy (none or from 3 to 15 min., none = 0 min.). The default setting is five
minutes. If the delay between the TrueCopy for Mainframe 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.
CAUTION: See step (9) below for instructions on selecting the correct Time Out (Copy Pending)
setting for your operational environment.
RCU Ready (min.): allows you 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 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.
To add one or more consistency groups to the connected MCU:
1. Make sure that the async options are configured as desired.
2. Click the Asynchronous Operation tab, and select the LDKC that the consistency groups you
want to operate belong to, or Not Used in the tree to display the unused consistency groups
in the list.
3. Select the (unused) consistency group(s) that you want to add. The XP24000/XP20000 Disk
Array supports up to 128 consistency groups (00-7F). The XP1024/XP128 Disk Array supports
up to 64 groups (00-3F). If you are adding a group with an XP1024/XP128 Disk Array RCU,
select a group ID between 00 and 3F.
The XP storage system supports up to 128 consistency groups (00-7F) per LDKC, and allows
you to use up to 128 consistency groups per entire storage system. XP24000/XP20000 Disk
Array supports up to 128 consistency groups (00-7F).
4. Right-click the selected group(s), click CT Group Operation, and then click Add CT Group to
open the Add CT Group dialog box (see
“Add CT Group Dialog Box” (page 118) ).
Asynchronous Operations 119