Installation guide

B
SCSI/CAM Utility Program
B.1 Introduction
The SCSI/CAM Utility Program, scu, interfaces with the Common Access
Method (CAM) I/O subsystem and the peripheral devices attached to Small
Computer System Interface (SCSI) busses. This utility implements the
SCSI commands necessary for normal maintenance and diagnostics of SCSI
peripheral devices and the CAM I/O subsystem.
The format of a SCU command is as follows:
scu>
[-f device-name-path][command[ keyword]...]
If a device name is not specified in one of the options on the command
line, the program checks the SCU_DEVICE environment variable to
determine the device name. If SCU_DEVICE is not set, you must use the
set nexus command to select the device and operation or some commands
may be restricted.
For example, if you do not specify a device name and SCU_DEVICE is not
set, you cannot format a disk because the scu utility cannot perform a
mounted file system check. See Section B.3 for a description of the set
command and its arguments.
If a command is not entered on the command line, the program prompts for
commands until you terminate the program. In most cases, you can
abbreviate commands to the lowest unambiguous number of characters.
This appendix contains an overview of the scu functions that system
administrators use. Detailed information, including examples of use, is
available through the online help for the scu utility. To use the help facility
once you are in the scu utility, issue the help command at the scu>
prompt.
B.2 SCU Utility Conventions
The following conventions describe the scu utility syntax:
SCSI/CAM Utility Program B–1