HP StorageWorks Continuous Access XP user guide for the XP10000/XP12000 (December 2005)

Continuous Access XP user guide for the XP10000/XP12000 79
S-VOLs in the group. A timeout occurs when the RCU cannot settle a recordset within the specified time
or has not had any communications 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.
• Time Out (RCU Ready) (min.): Maximum delay allowed for re-establishing MCU-RCU communications
following MCU power-off (none or from 1 to 10 minutes; none = no timeout for Continuous Access XP
Async RCU ready). The default is five minutes. If the MCU cannot re-establish communications with the
RCU within the specified time, the MCU suspends all P-VOLs in the group.
• Cancel button: Cancels settings.
• Set button: Sets consistency group options.
1. Connect to the MCU.
2. Split all pairs in the group (Pairsplit-r).
3. From the Consistency Group tree, click a consistency group mode that includes the consistency group to
be modified.
4. From the Consistency Group list, click the consistency groups to be modified. Select more than one
consistency group with MCU in the This CU column.
5. Right-click, click CT Group Operation, and click CT Group Option. The CT Group Option pane appears.
If the CT Group Option command is not enabled, split the remaining pairs in this consistency group.
6. Change group options as needed.
7. Click Set in the CT Group Option pane. The CT Group Option pane closes, and the list changes to the
Consistency Group Settings Parameter list. Settings are applied to the list.
NOTE: After being set, options can be modified and canceled (see ”Modifying parameters and
deleting consistency groups” on page 81).
8. Click Apply on the Continuous Access XP main pane to apply settings to the disk array.
9. When you are finished changing group options, resync all pairs in the group (pairresync).
When the CT Group Option pane is closed, the list changes to the Consistency Group Settings Parameter
list.
Figure 46 Consistency Group Settings Parameter list
• CTG: Consistency group number
• M-R Path: Channel type
• Time Out (Pending): Copy pending time out (maximum delay) allowed for Continuous Access XP Async
copy (in minutes)
• Time Out (Ready): RCU ready timeout (maximum delay) allowed for re-establishing MCU-RCU
communications following MCU power-off (in minutes)
Deleting consistency groups (Delete CT Group)
A consistency group can be deleted only from the MCU and only if the MCU does not contain P-VOLs still
assigned to the group. Deleting a consistency group from an MCU does not affect consistency groups
registered at other MCUs. The RCU automatically deletes a consistency group when the last volume pair in
the group is deleted.
Use the Delete CT Group command to delete the selected group from the current MCU.
1. Connect to the MCU.
2. From the Consistency Group tree, click a consistency group mode that includes the consistency group to
be deleted.