Dear SCO Customer,

Support Level Supplement (SLS) ptf7653a, the Adaptec Ultra160 
Family PCI SCSI IHV HBA Supplement, addresses this problem:

  - Kernel panic in adst70_timeout_remove routine during tape access.

This kernel panic condition was replicated by pressing and holding 
the tape eject button while the tape drive was busy.


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

SLS ptf7653a should only be installed on: 

     UnixWare 7 Release 7.0.0, 7.0.1, 7.1.0, 7.1.1


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

When using SLS ptf7653a 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:
 
        $ su
        Password: <type your root password>
        # mkdir /tmp/pkg
        # chmod 700 /tmp/pkg
        # cd /tmp/pkg

2. Download the ptf7653a.hba.adst70.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:
 
        # uncompress /tmp/pkg/ptf7653a.hba.adst70.dd.Z
        # dd if= ptf7653a.hba.adst70.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 it should be inserted 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 adst70

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.