HP StorageWorks XP Remote Web Console Software User Manual
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7.
If you also want to create and split L2 cascade pairs, add the L2 S-VOLs to the L1 pairs as
follows:
a.
Select the desired L1 pair from the Pairsplit Volume List.
b.
If you are selecting an existing L1 pair, make sure that the status of the desired L1 pair
is PSUS.
c.
From the Select MU list, select the MU number (1 or 2) for the L2 pair to be created.
d.
From the Pairsplit Volume List, select the volume that you want to assign as the S-VOL for
the L2 pair.
e.
Click Cascade to add the L2 S-VOL to the selected L1 pair. The new L2 pair to be created
will then be displayed in the Pairsplit Volume List.
f.
To add another L2 S-VOL to the same L1 pair, repeat steps
through
. Each L2 pair to
be created and split displays separately in the Pairsplit Volume List.
8.
Repeat step
until the desired pairs are displayed.
Use the Change button to replace S-VOLs, the Cascade button to add L2 S-VOLs, and the Delete
command selected from the menu (that displays by right-clicking) to remove pairs.
9.
When the Pairsplit dialog box displays the desired L1 and L2 pairs, click OK to reflect the
settings in the Pairsplit dialog box to the Preview List on the Pair Operation window.
10.
On the Pair Operation window, click Apply to apply the operation settings in the Preview List
to the storage system.
The pairs will then be created and split according to the operations set in the Pairsplit dialog
box. When the paircreate and pairsplit operations start, the Pair Operation window will show
that the status of the new pairs has changed to COPY(SP) or PSUS(SP) and the progress (%)
of the ongoing update copy operations. The pair status will change to PSUS when the pairsplit
operation completes. If there were no pending update copy operations, the pair status will
change to PSUS right away.
Performing At-Time Split Operation (Multiple Pair Splitting)
By using RAID Manager, you can immediately split the multiple XP Business Copy pairs in the same
consistency group. First define the consistency group in the RAID Manager configuration definition
file. XP Business Copy consistency groups have restrictions as shown in
.
Table 36 Specifications of Consistency Groups
Descriptions
Items
A number (0−127) is assigned to each consistency group. You can specify a consistency
group number when you create XP Business Copy pairs. If you do not specify a number,
Consistency group number
the storage system assigns a number automatically. Use the Volume List of the Pair
Operation window to view the default consistency group numbers.
You can configure up to 128 consistency groups in a storage system, including
ShadowImage for Mainframe consistency groups and XP Snapshot consistency groups.
You can define up to 8,192 XP Business Copy pairs in a consistency group. However,
you should count LUSE volumes that contain n LDEVs as n volumes. For further information
on LUSE volumes, see the HP XP24000/XP20000 LUN Expansion User Guide.
Number of pairs
NOTE:
XP Business Copy pairs, ShadowImage for Mainframe pairs, and XP Snapshot
pairs cannot co-exist in the same consistency group.
Consistency groups have the following restrictions:
•
L1 and L2 cascade pairs cannot be defined if they share the same node volume in a consistency
group. If these pairs are specified within the same consistency group, the paircreate command
will be rejected.
•
Do not mix pairs created with the At-Time Split operation and pairs not created with the At-Time
Split operation within the same group, as defined in the RAID Manager configuration file. If
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Performing XP Business Copy Operations