For details about DIF UNIT in the Copy Group Attributes panel (for BC Z/Cnt Ac-S Z/Cnt Ac-A),
see the HP P9000 for Business Continuity Manager Software Reference Guide. For details about
the difference between the units that manage the differential data between P-VOL data and S-VOL
data, see the Continuous Access Synchronous for Mainframe Systems User Guide.
Storage System Identification
Differences in storage system identification in Business Continuity Manager are described below.
Identification on the XP1024/XP128 Disk Array and XP12000/XP10000 Disk Array
When the storage system is an XP1024/XP128 or XP12000/XP10000 Disk Arrays, Business
Continuity Manager considers the storage systems themselves to be storage systems and treats the
numbers (physical DKC serial numbers) assigned to the individual storage systems as the storage
systems serial numbers.
Figure 7 (page 38) shows the storage system serial numbers for XP1024/XP128 Disk Array or
XP12000/XP10000 Disk Array.
Figure 7 Serial Numbers on an XP1024/XP128 or XP12000/XP10000 Disk Array
Identification on an XP24000/XP20000 and the P9500 Disk Array
When the storage system is an XP24000/XP20000 or P9500 Disk Array, the volumes identified
by the CU numbers 00 to FE are treated as belonging to a logical disk controller. Business Continuity
Manager considers these logical DKCs to be storage systems and treats the logical DKC serial
number assigned to each logical DKC as the serial numbers of a storage system.
Figure 8 (page 39) shows the storage system serial numbers for HP XP24000/XP20000 or P9500
Disk Array.
38 Overview of HP P9000 for Business Continuity Manager Software
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