Dear SCO Customer,

Support Level Supplement (SLS) ptf7451a, the UnixWare 7.1.0 MDAC SCSI HBA
Driver Supplement, addresses the following problem:

1. This error may be reported during bootup, when searching for timeout
   values for an unused channel of an HBA controller:

        pdi_timeout: error: ioctl (BI_NEW_TIMEOUT_VALUES) failed


Contents
--------

        /etc/conf/pack.d/dak/Driver_atup.o
        /etc/conf/pack.d/dak/Driver_mp.o


Software Notes and Recommendations
----------------------------------

SLS ptf7451 should only be installed on:

        UnixWare 7 Release 7.1.0


Installation Instructions
-------------------------

When using SLS ptf7451a as an additional HBA diskette during an operating 
system installation, be sure to insert this diskette _before_ any other 
HBA diskettes.  It should be inserted before the distribution HBA diskette,
even if the on-screen instructions seem to indicate otherwise.

1. Become root and create a new directory:
 
        $ su
        Password: <type your root password>
        # mkdir /tmp/pkg
        # chmod 700 /tmp/pkg
        # cd /tmp/pkg

2. Download the ptf7451a.hba.dak.dd file to the newly created 
   /tmp/pkg directory on your machine.
 
3. Make a floppy image of the file and add the SLS package to your system:
 
        # dd if=ptf7451a.hba.dak.dd of=/dev/dsk/f0t
        # pkgadd -d /dev/dsk/f0t

4. Reboot the system after installing this SLS package.


Removal Instructions
--------------------

1. As root, remove the SLS package using these commands:

        $ su
        Password: <type your root password>
        # pkgrm dak

2. Reboot the system after removing this SLS package.


If you have questions regarding this SLS, or the product on which 
it is installed, please contact your software supplier.