Compaq HSZ80 manual Designating the Host Scsi ID Number, 28Configuring Storagesets

4–28Configuring Storagesets

Designating the Host SCSI ID Number

The HSZ80 Array Controller allows multiple hosts on the same SCSI host bus to access units individually and based on a host port’s SCSI ID number. The ENABLE_ACCESS_PATH syntax implements this access, but restricts each host on the same bus from accessing other hosts’ units. For each unit, you must use two commands:

SET UNIT unit number DISABLE_ACCESS_PATH = ALL

SET UNIT unit number ENABLE_ACCESS_PATH = SCSI ID

The DISABLE_ACCESS_PATH switch disables all hosts from accessing a unit. But, the ENABLE_ACCESS PATH switch restricts access to a specific host.

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

Example

In Figure 4–3,a DIGITAL UNIX host and a Sun host are connected to Port 1 on the same host bus. Units D100 and D101 have been assigned to SCSI ID 7, the DIGITAL UNIX host. Units D102 and 103 have been assigned to SCSI ID 6, the Windows NT host.

NOTE: Figure 4–3shows an example of a heterogeneous host configuration. For supported host operating systems, refer to the HSZ80 Array Controller ACS Version 8.3 Release Notes.