Compaq External RAID Controller & Subsystem Infortrend, Руководство по эксплуатации

Страница: 199 / 347

Advanced Configurations
9-14
host adapter. If the driver is not loaded, the host computer will not
be able to use the in-band utility to communicate with the RAID
controller. This is often the case when users want to start
configuring a RAID using management software from the host. It
will be necessary to configure the "Peripheral Device Type" setting
for the host to communicate with the controller. If the "LUN-0's
only" is selected, only LUN-0 of the host ID will appear as a device
with the user-defined peripheral device type. If "all undefined
LUNs" is selected, each LUN in that host ID will appear as a device
with the user-defined peripheral device type.
Different "LUN applicability" selections are available: “Device
Type” selection, “Device Qualifier Support,” “Support Removable
media,” "LUN-0's only," and "All undefined LUNs." Please refer to
the table of peripheral device setting for details concerning various
operating systems.
Peripheral Device Type:
For connection without a preset logical unit to a host, the in-band
SCSI protocol can be used for the host to “see” the RAID controller.
Please refer to the reference table below. You will need to make
adjustments in the following submenu: Peripheral Device Type,
Peripheral Device Qualifier, Device Support for Removable Media,
and LUN Application.
In-band (SCSI or Fibre):
What is In-band?
External devices require communication with the host computer for
device monitoring and administration. In addition to the regular
RS-232, in-band SCSI can serve as an alternative means of
management communication. In-band SCSI translates the original
configuration commands into standard SCSI commands. These
SCSI commands are then sent to and received by the controller over
the existing host link, be it SCSI or Fibre.