HP XP RAID Manager Software - Manual (Page 39)

6. To set an alternate command device, repeat this procedure for another volume. For information
about alternate command devices, see
“About alternate command devices” (page 39) .
NOTE:
•
For Solaris operations, the command device must be labeled.
•
To enable dual pathing of the command device under Solaris systems, include all paths
to the command device on a single line in the HORCM_CMD section of the configuration
definition file.
Example 1 “Example of alternate path for command device for Solaris
systems” shows an example with two controller paths (c1 and c2) to the command device.
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.
Example 1 Example of alternate path for command device for Solaris systems
HORCM_CMD
#dev_name dev_name dev_name
/dev/rdsk/c1t66d36s2 /dev/rdsk/c2t66d36s2
Setting command device and virtual command device by in-band and out-of-band
methods
For executing a command by the in-band method, set an LU path in a configuration definition file
and create a command device. The command device in the storage system specified by the LU
path accepts the command from the client, and executes the operation instruction.
Meanwhile, for executing a command by the out-of-band method, create a virtual command device.
The virtual command device creates an IP address of the SVP, a UDP communication port number
(fixed at 31001), and a DKC storage system unit number in the configuration definition file.
By creating the virtual command device, transfer the command from the client or the server via
LAN to the virtual command device of the set IP address in the SVP, and assign an operation
instruction to the DKC.
A setting example of a command device and a virtual command device (by the in-band and
out-of-band methods) in a configuration definition file is shown below. For details, see the manual
HP P9000 RAID Manager User Guide.
Example 2 Setting example of command device in configuration definition file (in-band method)
HORCM_CMD
#dev_name dev_name dev_name
\\.\CMD-64015:/dev/rdsk/*
The case where an SVP IP address 192.168.1.100, a UDP communication port number 31001,
and a DKC unit number 00001 are specified.
Example 3 Setting example of virtual command device in configuration definition file (out-of-band
method)
HORCM_CMD
#dev_name dev_name dev_name
\\.\IPCMD-192.168.1.100-31001
About alternate command devices
If RAID Manager receives an error notification in reply to a read or write request to a command
device, the RAID Manager software can switch to an alternate command device, if one is defined.
If a command device is unavailable (for example, blocked due to online maintenance), you can
switch to an alternate command device manually. If no alternate command device is defined or
Setting the command device 39