User`s guide

information. Refer to the HSZ array controller release notes for supported host
adapters and DEC OSF/1 version levels for ASE.
8.4.3 Configurations and Device Support for the HSZ Array Controllers
The following sections describe the type of device support and how those devices
can be used for the Version 2.5 firmware release for HSZ array controllers.
Only disk-type devices (rzxx and ezxx) are supported at the time of printing.
Refer to the HSZ array controller release notes and SPD for current information.
Disks attached via an HSZ array controller can be either data or system devices.
1
A disk (physical or virtual) name used as a system device for DEC OSF/1 ‘‘must’’
be defined using only LUN 0 (as visible to the system). For example, UNIT 0, or
UNIT 100 (any unit where the ones digit is 0, the LUN is 0).
8.4.3.1 Virtual Terminal Capability
The virtual maintenance terminal facility for communicating with an HSZ array
controller over its SCSI bus interface is provided by a host user application called
HSZterm. For details about HSZterm restrictions and instructions for using the
program, refer to the StorageWorks configuration manager documentation listed
in the Related Documentation section in the preface of this manual.
8.4.3.2 DEC OSF/1 Device Special Files for HSZ Array Controllers
For DEC OSF/1 to recognize multiple LUNs behind a given target (such as the
HSZ array controller) [hereafter referred to as units], the DEC OSF/1 device
special files for each LUN must be manually created. The following information
is required to create these device special files:
• The bus number in which the SCSI Host Adapter resides
• The target number containing the LUN
• The LUN number
It is recommended that the following guidelines be used for choosing the DEC
OSF/1 device names for the DEC OSF/1 device special files that are going to be
used for HSZ40 devices:
This document uses an OSF/1 device naming scheme for HSZ40 units that is in
the following format:
rzxnny.
The x should be one alphabetic character between a - h. This character represents
the Host Side LUN that is part of an HSZ40 unit designator. That is:
a = LUN 0
b = LUN 1
c = LUN 2
d = LUN 3
e = LUN 4
f = LUN 5
g = LUN 6
h = LUN 7
The nn is a number. This number is calculated using the following formula:
( 8 * Host Side SCSI Bus #) + (Target ID from HSZ40 unit designator)
1
Refer to the HSZ array controller release notes for restrictions.
8–22 Operating System Support