HP XP7 Storage - Manual (Page 33)

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MU#for Continuous Access Synchronous/Cnt Ac-J : Defines the mirror unit number (0 - 3) to
use the redundant mirror for the identical LU on Continuous Access Synchronous/Cnt Ac-J. If
this number is omitted, it is assumed to be zero (0). The Cnt Ac-J mirror description is described
in the MU# column by adding "h" in order to identify identical LUs as the mirror descriptor
for Cnt Ac-J. The MU# for Continuous Access Synchronous must be specified only "0".
Continuous Access Synchronous has only one mirror description, but UR has four mirrors as
shown below.
S-VOL P-VOL SMPL Feature
MU#h1 - h3 MU#0 MU#h1 - h3 MU#0 MU#h1 - h3 MU#0
Not valid Valid Not valid Valid Not valid Valid Continuous
Access
Synchronous
Valid Valid Valid Valid Valid Valid Cnt Ac-J
(4) HORCM_INST
The instance parameter (HORCM_INST) defines the network address (IP address) of the remote
server (active or standby). It is used to view or change the status of the paired volume in the remote
server (active or standby). When the primary volume is shared by two or more servers, there are
two or more remote servers using the secondary volume. Thus, it is necessary to describe the
addresses of all of these servers.
The following values are defined in the HORCM_INST parameter:
•
dev_group: The server name described in dev_group of HORC_DEV.
•
ip_address: The network address of the specified remote server.
•
service: The port name assigned to the HORCM communication path (registered in the
/etc/services file). If a port number is specified instead of a port name, the port number will
be used.
When HORCM has two or more network addresses on different subnets for communication, the
ip_address of HORCM_MON must be NONE. This configuration for multiple networks can be
found using the raidqry -r <group> command option on each host. The current HORCM network
address can be changed using horcctl -NC <group> on each host.
RAID Manager instance components on the host server 33