Dear SCO Customer, Support Level Supplement (SLS) ptf7440a, the UnixWare 7 ReliantHA MSW Supplement, corrects the problem of the MSW system failing to de-initialize correctly, which can result in a machine hang during shutdown. The problem is caused by improper de-allocation of resources within the MSW subsystem. The machine hang will only occur if the MSW/SDL drivers have been configured. With SLS ptf7440a, the two binaries have been modified to de-configure the MSW and SDL drivers. A new -d option has been added to sdlconfig. The mswconfig changes employ the existing -u option to de-configure correctly. A new rc script, K67msw, is provided to the de-configured MSW upon each machine shutdown. SLS ptf7440a contains: /etc/rc0.d/K67msw /sbin/mswconfig /sbin/sdlconfig Software Notes and Recommendations ---------------------------------- SLS ptf7440a should only be installed on: UnixWare 7 ReliantHA 1.1 on UnixWare 7.0.0 with the UnixWare 7 Release Supplement (uw7rs) UnixWare 7 ReliantHA 1.1 on UnixWare 7.0.1, 7.1.0, 7.1.1 Installation Instructions ------------------------- 1. Download the ptf7440a.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: # uncompress /tmp/ptf7440a.Z # pkgadd -d /tmp/ptf7440a # rm /tmp/ptf7440a 3. There is no need to reboot the system after installing this SLS package. The release notes displayed prior to installation can be found in: /var/sadm/pkg/ptf7440/install/ptf7440.txt Removal Instructions -------------------- 1. As root, remove the SLS package using these commands: $ su Password: # pkgrm ptf7440 2. There is no need to 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.