HP StorageWorks XP Remote Web Console Software - Manual (Page 16)

16 Requirements and overview of copy operations
• If you perform Flex Copy XP copy operations concurrently with Business Copy XP or Auto LUN XP copy
operations, the performance of each of these copy operations degrades (that is, each of these copy
operations is slower).
Performance of a Flex Copy XP copy operation on a volume degrades if the parity group containing
this volume also contains a volume that a Business Copy XP or Auto LUN XP copy operation is using.
• Figure 4 shows the configuration of two Microsoft Cluster Server (MSCS) nodes (combining MSCS and
Backup) in a single node (Node 2). In this case, the MSCS on node 2 might incorrectly recognize the
external LU as the volume under the MSCS on node 1. Therefore, you must change the external LU’s
volume signature. However, Flex Copy XP does not support MSCS configurations, and the case
described in Figure 4 does not occur. This means that changing the external LU’s signature is not
required.
Figure 4 Configuration of two MSCS nodes in a single node
Cautions about Flex Copy XP copy pair volumes
When starting Flex Copy XP copy pair operations and during copy processing, you must be careful
handling volumes related to Flex Copy XP operations. If volumes are not handled according to these
cautions, copy processing might fail because of, for example, an abnormal termination or defective
copying of data.
The following sections describe cautions about volumes related to Flex Copy XP pair operations using
configuration pattern examples.
Cautions about starting copy operations
The following are cautions about volumes when you start Flex Copy XP copy pair operations, and they use
configuration pattern examples.
• Configuration pattern example 1
In the type of configurations shown in
Figure 5 , note the following for each volume:
• Volume 1: Volume 1 must be offline. Volume 1 must not be a P-VOL or S-VOL for Business Copy XP.
• Volume 2: Volume 2 must be offline. For Volume 2, the S-VOL Disable mode must not be set using
LUN Security XP Extension.