Compaq Infortrend manual Peripheral Device Type, In-band SCSI or Fibre, What is In-band?, 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.

Advanced Configurations 9-14