Dear SCO Customer,

Support Level Supplement (SLS) ptf7629a, the Symbios, Inc. 53c8xx 
PCI SCSI HBA Supplement, addresses these problems for UnixWare 7.1.1:

1.  The timeout value received from the OS for each command is now 
    in seconds, rather than in milliseconds. This required removal 
    of a divide by 1000, since the driver times out commands based 
    upon a seconds value.

2.  A small routine, c8xx_continueq, was removed due to it being 
    identical to routine c8xx_resumeq.  All calls to c8xx_continueq 
    were changed to c8xx_resumeq.

3.  During initialization, device scan was changed from polling for 
    command completion to using callback routines.

4.  Changes were made to properly detect and access Non-Volatile 
    Storage (NVS) without having to loop through the resmgr entries.
    The driver now generates a resmgr entry for the NVS physical 
    address, so that the virtual address can be mapped, the NVS data
    retrieved, and then the resmgr entry that was generated, deleted. 
    This is done only once for each host adapter during initialization.
    The data is saved for future access.


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

SLS ptf7629a should only be installed on:

        UnixWare 7 Release 7.1.1


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

When using SLS ptf7629a 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 ptf7629a.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:

        # uncompress /tmp/pkg/ptf7629a.hba.c8xx.dd.Z
        # dd if=ptf7629a.hba.c8xx.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 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.