DOCUMENT ID:  0913-02

SYNOPSIS:     Adding hardware to an existing system

OS RELEASE:   2.1, 2.4, 2.5

PRODUCT:      Solaris x86

KEYWORDS:     Add hardware system driver test hard disk scsi tape drive


DESCRIPTION:

Adding hardware to an existing system can sometimes be a mysterious
process.  The hardware may be a forgotten or a new network adapter, a
second hard disk controller, or a SCSI tape drive. 


SOLUTION:

A device is introduced to the system by configuring parameters and
causing a "reconfigure" (b -r ) during the booting process.  The typical
parameters are: interrupt, i/o address, and shared memory address and
valid choices may be found in ".conf" files in the /kernel/drv
directory. 

Only the device SCSI target must be configured when adding SCSI devices. 
The device probing during the booting process should detect the device
and attach "an instance" of the driver along with a unit number.  The
unit number is assigned based on the detected parameters.  The
attachment of the device may be verified by using the "prtconf" command. 
In the case of SCSI a command "dd if=/dev/cxtx of=/dev/null count=10"
may be used to further test the device.  A similar process may be used
to test an additional SCSI hard disk. 


DATE APPROVED: 09/12/95