HP XP Racks - Manual (Page 40)

volume space is reserved for RAID Manager and its utilities. A Virtual LUN volume as small as 36
MB can be used as a command device.
First you set the command device using LUN Manager, and then you define the command device
in the HORCM_CMD section of the configuration definition file for the RAID Manager instance on
the attached host. When you use a command for provisioning, user authentication is required. Set
enable the user authentication on the security attribute of a command device.
To set a command device:
1.
Make sure the device that will be set as a command device does not contain any user data.
Once a volume is set as a command device, it is inaccessible to the host.
2. Log on to Remote Web Console, and connect to the storage system on which you want to set
a command device.
3. Configure the device as needed before setting it as a command device. For example, use
Virtual LUN to create a device that has 36 MB of storage capacity. For instructions, see the
Provisioning manual or the Virtual LUN manual for the storage system.
4. Using LUN Manager, locate and select the device, and set the device as a command device.
For details, see the Provisioning manual or the LUN Manager manual for the storage system.
If you want to use the RAID Manager Protection Facility, also enable command device security
at this time. For instructions, see the Provisioning manual for the storage system. For information
about the Protection Facility, see the HP XP7 RAID Manager User Guide.
5. Write down the system raw device name (character-type device file name) of the command
device (for example, /dev/rdsk/c0t0d1s2 in Solaris, \\.\CMD-Ser#-ldev#-Port# in Windows).
You will need this information when you define the command device in the configuration
definition file.
6. To set an alternate command device, repeat this procedure for another volume. For details
about alternate command devices, see
“About alternate command devices” (page 41) .
NOTE:
•
For Solaris operations, the command device must be labeled.
•
To enable dual path 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 dual 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 about 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 dual 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 storage system unit number in the configuration definition file.
40 Installing and configuring RAID Manager