HP XP P9500 Storage - Manual (Page 53)

Connecting to RAID Manager server already connected by In-Band method
using Out-of-Band method
In Out-of-Band method, the RAID Manager server port can also be specified as a virtual command
device. For this reason, the server which connected to a storage system in In-Band method can be
connected in Out-of-Band method. If a the server is specified as a virtual command device, it
provides a better performance than Out-of-Band method specified SVP as a virtual command device.
Hardware requirements
RAID Manager uses SCSI path through driver to issue I/O for command device. To use the RAID
Manager server port as virtual command device, the virtual command deviece interface needs to
be converted to the actual SCSI path through interface. Following is the environment for using the
server port as a virtual command device.
•
The server which can set virtual command devices
RAID Manager support platform except Tru64UNIX and the environment can be used SCSI
path through driver
•
Client PC which can issue commands to virtual command devices
It must be a RAID Manager support platform. Windows client such a Windows XP can be
used as well.
•
Initiator port
Initiator port is required. Following is the default port number.
If not specified the instance number: 34000
If specified instance number (X): 34000 + X + 1
If you change the default port number, use following environment variables.
$HORCM_IPSCPORT=*
* : port number or service name
For the detail of the RAID Manager support platform, see the HP XP P9000 RAID Manager
Installation and Configuration Guide.
I/O Traffic Control
Synchronized I/O is issued from a virtual command device. The queueing time may occur because
of the heavy I/O traffic because the virtual command device has to relay the command to the next
virtual command device in the cascade configuration using the virtual command device. To improve
the response in this environment, define the configuration so that asynchronous I/O is issued using
the following environment variables.
$HORCM_IPSCPAIO=1
Security setting
Following security can be set.
•
Specifying security of IP address and port number
By defining IP address and port number of the client PC that issues command to virtual command
device to HORCM_ALLOW_INST in the configuration definition file, users who can use virtual
command device can be restricted. For the details about the settings to HORCM_ALLOW_INST,
please refer to "Configuration definition file".
•
Security setting for virtual command device
By using the following environment variable, security can be set to virtual command device.
$HORCM_IPCMDSEC=
Connecting to RAID Manager server already connected by In-Band method using Out-of-Band method 53