2) horcm_cmd – HP XP P9500 Storage User Manual
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•
Poll: The interval for monitoring paired volumes. To reduce the HORCM daemon load, make
this interval longer. If set to -1, the paired volumes are not monitored. The value of -1 is specified
when two or more RAID Manager instances run on a single machine.
•
Timeout: The time-out period of communication with the remote server.
(2) HORCM_CMD
The command parameter (HORCM_CMD) defines the UNIX device path or Windows physical
device number of the command device. The command device must be mapped to the SCSI/Fibre
using the LUNM software. You can define more than one command device to provide failover in
case the original command device becomes unavailable (see
“About alternate command devices”
).
To enable dual pathing of the command device under Solaris systems, make sure to include all
paths to the command device on a single line in the HORCM_CMD section of the configuration
file. Putting the path information on separate lines may cause parsing issues, and failover may not
occur unless the HORCM startup script is restarted on the Solaris system.
When a server is connected to two or more storage systems, the HORCM identifies each storage
system using the unit ID (see
). The unit ID is assigned sequentially in the order
described in this section of the configuration definition file. The server must be able to verify that
unit ID is the same Serial# (Seq#) with among server when the storage system is shared by two or
more servers. This can be verified using the raidqry command.
Figure 13 Configuration and unit IDs for multiple storage systems
dev_name for Windows
In the Windows SAN environment, “Volume{guid}” is changed on every reboot under
MSCS/Windows 2003/2008, if Windows finds the same signature on the command device
connected with Multi-Path. Therefore, the user must find NEW “Volume{guid}” and change
“Volume{guid}” described in the RAID Manager configuration file. RAID Manager supports the
following naming format specifying Serial#/LDEV#/Port# as notation of the command device for
only Windows.
\\.\CMD-Ser#-ldev#-Port#
HORCM_CMD
#dev_name dev_name dev_name
\\.\CMD-30095-250-CL1-A
To allow more flexibility, RAID Manager allows the following format.
•
For minimum specification. Specifies to use any command device for Serial#30095
\\.\CMD-30095
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Sample configuration definition files