Dear SCO Customer,

Support Level Supplement (SLS) ptf7648a, the UnixWare 7.1.0 and 7.1.1
bcheckrc and umountall Supplement, addresses the following problem:

1. Systems hang in Kmem_free after running umountall.

   This problem is due to umountall unmounting /dev/_tcp. umountall
   was modified to not unmount the special filesystem /dev/_tcp.

   In addition, bcheckrc was modified to mount /dev/_tcp and the system's
   vfstab is updated to prevent the automounting of /dev/_tcp.


Contents
--------

        /sbin/bcheckrc
        /sbin/umountall


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

SLS ptf7648a should only be installed on:

        UnixWare 7 Release 7.1.0, 7.1.1

NOTE:  This supplement has been superseded by
the UnixWare 7.1.1 Maintenance Pack for UnixWare 7.1.1 platforms
only.  The UnixWare 7.1.1 Maintenance Pack is available from:

ftp://ftp.caldera.com/pub/unixware7/uw711pk


If your system is running any libraries or commands that are
contained in this SLS, then these programs will continue to run
with the old versions of these libraries or commands until the
the system is rebooted.

Note that when all necessary patches have been installed, it is
recommended that you reboot the system at the earliest opportunity.
This will ensure that no programs continue to run with the old
libraries or commands.


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

1. Download the ptf7648a.Z file to the /tmp directory on your machine.

2. As root, uncompress the file and add the package to your system
   using these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7648a.Z
        # pkgadd -d /tmp/ptf7648a
        # rm /tmp/ptf7648a

Alternatively, this SLS package may be installed in quiet mode, 
that is, without displaying the release notes and asking for 
confirmation.  To do this, use these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7648a.Z
        # pkgadd -qd /tmp/ptf7648a all
        # rm /tmp/ptf7648a

3. There is no need to reboot the system after installing this package.

The release notes displayed prior to installation can be found in:

        /var/sadm/pkg/ptf7648/install/ptf7648.txt


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

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

        $ su
        Password: <type your root password>
        # pkgrm ptf7648

2. There is no need to reboot the system after removing this package.


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