Arrays; Main And Remote Control Units (Mcus And Rcus); Continuous Access Xp Components For Fibre Channel Connections; Raid-Level Configurations For Continuous Access Xp - HP StorageWorks XP12000 User Manual

Figure 1 Continuous Access XP components for Fibre Channel connections

Arrays

Continuous Access XP operations involve primary (main) disk arrays and secondary (remote) disk arrays
(MCUs and RCUs). This document describes Continuous Access XP operations in which the main disk
array is an XP array. MCUs contain Continuous Access XP primary volumes (P-VOLs), which contain
original data and are online to the hosts. RCUs contain Continuous Access XP secondary volumes
(S-VOLs), which are synchronous or asynchronous copies of the P-VOLs. Continuous Access XP supports
all CU images and logical volumes of the disk array and all physical hard drive options. Continuous
Access XP supports RAID1, RAID5, and RAID6 configurations for the array.
Table 2 shows RAID-level configurations for Continuous Access XP.
Table 2 RAID-level configurations for Continuous Access XP
RAID level of P-VOL
RAID1
RAID5
RAID6
To provide greater flexibility and enable the disk array to be tailored to unique customer operating
requirements, additional operational parameters, or optional modes, are available for the disk array. At
installation, modes are set to their default values, so discuss these settings with your HP support team.
Modes can only be changed by your HP support team representative.
Contact your HP account support representative for the latest mode information.

Main and remote control units (MCUs and RCUs)

The main control unit (MCU) and remote control unit (RCU) control Continuous Access XP operations:
• The MCU is the control unit in the primary disk array that controls the P-VOLs of the Continuous
Access XP volume pairs. For Command View XP, the management station must be LAN-attached
to the MCU of each Continuous Access XP pair. For Remote Web Console and Command View
RAID level of S-VOL
RAID1
Supported
Supported
Supported
RAID5
Supported
Supported
Supported
Continuous Access XP user guide
RAID6
Supported
Supported
Supported
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