Specifications

134 en | Host-side and Drive-side Parameters SCSI to SATA RAID Subsystem | Administrator’s Manual
F.01U.027.802 | V1 | 2006.11 Bosch Security Systems
8.1.5 LUN Applicability
If no logical drive has been created and mapped to a host LUN, and the RAID controller is the
only device connected to the host SCSI card, usually the operating system will not load the
driver for the 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 Quali-
fier Support,” “Support Removable media,” "LUN-0's only," and "All undefined LUNs." Please
refer to Section 8.1.8 Peripheral Device Type Parameters for Various Operating Systems for
details concerning various operating systems.
8.1.6 Peripheral Device Type
For connection without a pre-configured logical unit and Ethernet link to a host, the in-band
SCSI protocol can be used in order for the host to “see” the RAID subsystem. Please refer to
the reference table below. You will need to make adjustments in the following submenus:
Peripheral Device Type, Peripheral Device Qualifier, Device Support for Removable Media, and
LUN Application.
Fig. 8.6 Peripheral Device Type
8.1.7 In-band (SCSI channel)
External devices (including a RAID subsystem; from the view of operation on an application
server or management PC) require communication links with a management computer for
device monitoring and administration. In addition to the regular RS-232C or Ethernet connec-
tion, in-band SCSI can serve as an alternative means of management communications. 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 links,
either SCSI or Fibre.