Dear SCO Customer,

Support Level Supplement (SLS) ptf7418c, the UnixWare 7.1.0 mpio, sysdump, 
and sd01 Driver Update, addresses all of the following problems.

These issues were addressed in SLS ptf7418a:

1.  The system hangs during failover testing.

2.  sd01Reserve in sd01.c reserves the wrong disk.

3.  The system hangs during MPIO dual path failover test.

4.  The system hangs while attempting a system dump on UnixWare 7.1.0.

5.  Building KMA_PARANOID results in data corruption in SDI and sd0.
    (SLS ptf7419c or later is also needed for a complete solution to 
    this problem).

6.  A memory leak occurs related to vtoc open.

7.  Emergency recovery disks cannot be created after ptf7036c is applied.


This issue was addressed in SLS ptf7418b:       

8.  sd01strat1() does not recognize retry code. Therefore, if an HBA
    fails to assign memory, sdi_xtranslate() returns SDI_RET_RETRY and
    can cause a system hang.


This issue was additionally addressed in SLS ptf7418c:

9.  sd01getalts() was amended to prevent kernel memory abuse.


SLS ptf7418c contains: 

        /etc/conf/pack.d/mpio/Driver.o
        /etc/conf/pack.d/sd01/Driver.o
        /etc/conf/pack.d/sd01/space.c
        /etc/conf/pack.d/sysdump/Driver_atup.o
        /etc/conf/pack.d/sysdump/Driver_mp.o
        /usr/include/sys/buf.h


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

SLS ptf7418c should only be installed on:

        UnixWare 7 Release 7.1.0


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

1. Download the ptf7418c.Z file to the /tmp directory on your machine.

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

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7418c.Z
        # pkgadd -d /tmp/ptf7418c
        # rm /tmp/ptf7418c

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/ptf7418c.Z
        # pkgadd -qd /tmp/ptf7418c all
        # rm /tmp/ptf7418c

3. Reboot the system after installing this SLS package.

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

        /var/sadm/pkg/ptf7418/install/ptf7418.txt


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

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

        $ su
        Password: <type your root password>
        # pkgrm ptf7418

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.