HP XP7 Storage - Manual (Page 155)

Legend
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HORCM : The manager is a demon process, executes multiple commands, charges to a storage
system through itself. Among the managers are connected by UDP, remotely execute a
command among the servers mutually.
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Command : A command provisioned by RAID Manager.
Continuous Access Synchronous local commands
Figure 51 (page 155) illustrates a Continuous Access Synchronous local configuration. The RAID
Manager Continuous Access Synchronous local commands assist the system operation with volume
backups among UNIX servers and their operating system management functions. The Continuous
Access Synchronous local commands perform the same functions as the remote commands but
within the same RAID storage system instead of between two RAID storage systems.
Figure 51 Continuous Access Synchronous local system configuration
Continuous Access Synchronous, Business Copy, and Continuous Access
Journal operations
Continuous Access Synchronous/Business Copy volumes
Continuous Access Synchronous commands allow you to create volume pairs consisting of one
primary volume (P-VOL) and one secondary volume (S-VOL). The Continuous Access Synchronous
P-VOL and S-VOL can be in different storage systems. Continuous Access Synchronous provides
synchronous and asynchronous copy modes. Continuous Access Asynchronous can only be used
between separate storage systems (not within one storage system). For details on Continuous Access
Synchronous specifications, volumes and operations, please see the HP XP7 Continuous Access
Synchronous User Guide for your storage system.
Business Copy commands allow you to create volume pairs consisting of one P-VOL and up to nine
S-VOLs using the Business Copy cascade function. Business Copy pairs are contained within the
same storage system and are maintained using asynchronous update copy operations. For details
on Business Copy specifications volumes and operations, please see the HP XP7 Business Copy
User Guide for your storage system.
Each volume pair that you want to create must be registered in the RAID Manager configuration
file. Business Copy volume pairs must include a MU (mirrored unit) number assigned to the S-VOL.
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