Hitachi Command Control Interface (CCI) User and Reference Guide 57
MU# for HORC/Universal Replicator: Defines the mirror unit number (0 - 3) of one of
four possible HORC/UR bitmap associations for an LDEV. If this number is omitted, it is
assumed to be zero (0). The Universal Replicator mirror description is described in the
MU# column by adding “h” in order to identify identical LUs as the mirror descriptor for
UR. The MU# for HORC must be specified “blank” as “0”. The mirror description for
HORC is only one, but UR will have four mirrors, as shown below.
SMPL P-VOL S-VOL
State/
Feature
MU#0 MU#h1 - h3 MU#0 MU#h1 - h3 MU#0 MU#h1 - h3
TrueCopy Valid Not Valid Valid Not Valid Valid Not Valid
Universal Replicator Valid Valid Valid Valid Valid Valid
HORCM_INST. The instance parameter (HORCM_INST) defines the network address (IP
address) of the remote server (active or standby). It is used to refer to 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 raidqry -r <group> command option on each host. The current network
address of HORCM can be changed using horcctl -NC <group> on each host.
