Compaq HSZ80 manual Designating the Port and Designating the Host Scsi ID Number

4–30Configuring Storagesets

Designating the Port and Designating the Host SCSI ID

Number

Using a two-step process, port access can be combined with shared host access on the same bus further restricting one host from accessing another host’s units. You start by assigning units on a port using the SET THIS PORT_n_ID command, followed by restricting access between hosts on the same host SCSI bus using the DISABLE_ACCESS_PATH and ENABLE_ACCESS_PATH switches.

Example

In Figure 4–4,two Windows NT hosts are connected to Port 1 on the same host bus and a DIGITAL UNIX host is connected to Port 2 on a separate SCSI host bus. Because all targets default to Host Mode A—which includes DIGITAL UNIX—you only need to set targets to other host operating systems, such as Windows NT.

Units D100 and D101 have been assigned to Port 1 and SCSI ID 7, a Windows NT host. Units D102, D103, and D104 have been assigned to Port 1 and SCSI ID 6, another Windows NT host. Units D200 and D201 have been assigned to Port 2, the DIGITAL UNIX host.

NOTE: By default, units are enabled for all SCSI ID numbers. You must first disable the unit for all SCSI ID numbers, followed by enabling the unit for a specific host SCSI ID number.

NOTE: Figure 4–4shows an example of a heterogeneous host configuration. For supported host operating systems, refer to the HSZ80 Array Controller ACS Version 8.3 Release Notes.