Dear SCO Customer,

Support Level Supplement (SLS) ptf7047c, the DDI7 c8xx HBA Supplement, 
addresses the following problems:

  - The performance of ARCserve tape operations is poor on systems
    using a c8xx HBA to control the tape unit.

  - On some tape devices it may not be possible to restore data from 
    a backup created by ARCserve.

  - The numbering of HBA controllers when c8xx devices are present in
    the system can be strange and may result in incorrect operation,
    such as the inability to boot the system after an installation.

  - Command timeout messages are displayed while using ARCserve.
    These may be followed by a system panic.

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

SLS ptf7047c should only be installed on: 

    SCO UnixWare Application Server Release 2.1.0, 2.1.1, 2.1.2, 2.1.3
    SCO UnixWare Personal Edition Release 2.1.0, 2.1.1, 2.1.2, 2.1.3
    UnixWare 7 Release 7.0.0, 7.0.1


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

When using SLS ptf7047c as an additional HBA diskette during an operating 
system installation, be sure to insert this diskette _before_ any other 
HBA diskettes.

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

2. Download the ptf7047c.hba.c8xx.dd.Z file to the newly created 
   /tmp/pkg directory on your machine.
 
3. Uncompress the file, make a floppy image of the file and add the 
   SLS package to your system using these commands:
 
        # uncompress /tmp/pkg/ptf7047c.hba.c8xx.dd.Z
        # dd if=ptf7047c.hba.c8xx.dd of=/dev/dsk/f0t
        # pkgadd -d /dev/dsk/f0t

4. Reboot the system after installing this SLS package.

5. When using this HBA during installation, be sure to insert it 
   before the distribution HBA diskette, even if the on-screen 
   instructions seem to indicate otherwise.


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

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

        $ su
        Password: <type your root password>
        # pkgrm c8xx

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.