Dear SCO Customer, The Connection Drivers Support Level Supplement (SLS) UOD385A resolves several problems in regard to file system connectivity and network data transfer issues for Microsoft LAN Manager for UNIX Systems Release 2.2.0 (hereafter referred to simply as LAN Manager). It is highly recommended that SLS UOD385A and the Microsoft LAN Manager for UNIX Systems Server Maintenance Supplement 2.2.1 be applied to the LAN Manager 2.2.0 server. Doing so will provide the best possible environment and will bring the LAN Manager server software to revision level 2.2.1. The enclosed Support Level Supplement (SLS) UOD385A contains drivers for the following products: SCO UNIX System V/386 Release 3.2 Operating System Version 4.1 and 4.2 SCO Open Desktop Release 2.0 and 3.0 SCO Open Desktop Lite Release 3.0 SCO Open Server Network System Release 3.0 SCO Open Server Enterprise System Release 3.0 SLS UOD385A contains the following: 1. A new /etc/conf/pack.d/s5/Driver.o file. An updated /etc/conf/pack.d/. s5/space.c file is also installed on SCO Open Desktop 2.0 and SCO UNIX Operating System Version 4.1. The update to this driver addresses silent corruption of files, when written from the application on the client to the network drive on the server. An application that holds the target file open and issues a chsize(S) call to change the size of the file is subject to this problem. This issue has been reported by users of Microsoft MSWORKS, Microsoft Excel and Lotus 123. 2. A new /etc/conf/pack.d/sp/Driver.o and /etc/conf/pack.d/sp/space.c file. Updates to this driver essentially remove a minor deadlock situation that is manifested by: (1) server hangs under extremely heavy data transfer; (2) intermittent failures when copying multiple files (copy *.*) between the server and a workstation; (3) failures by the server to validate work- station net logon attempts. 3. A new /etc/conf/pack.d/hs/Driver.o file. Updates to this driver correct an intermittent problem with mounted high-sierra file systems on the LAN Manager server. The LAN Manager workstation is unable to report the existence of directories. This problem is seen when the directory files '.' and '..' have the same inode number. INSTALLATION INSTRUCTIONS AND NOTES ----------------------------------- It is recommended that the Microsoft LAN Manager for UNIX Systems Server Maintenance Supplement 2.2.1 be installed first, followed by SLS UOD385A. You may postpone relinking of the kernel until installation of the SLS. This will avoid an unnecessary second relinking of the kernel. The /etc/conf/pack.d/s5/Driver.o file supplied with SLS UOD385A is not compatible with the same driver supplied in SLS UOD381A. It is NOT safe to install SLS UOD385A and SLS UOD381A on the same machine. Installation of SLS UOD385A on a machine running SYBASE with SLS UOD381A will violate the integrity of the SYBASE level 10 environment. The /etc/conf/pack.d/s5/Driver.o file supplied with SLS UOD385A is not XPG4 compliant. At this time, it is necessary for a customer to choose between installing SLS UOD385A and strict XPG4 compliance, they cannot have both. This will be corrected in a future release of SLS UOD385. To install SLS UOD385A, take the following steps: 1. Shutdown and reboot your system. Enter System Maintenance mode by typing your root password at the prompt: Type CONTROL-d to proceed with normal startup, (or give root password for System Maintenance) 2. Type: /etc/custom 3. The main custom "menu" will appear. The "Install" option will be highlighted. Press to select the "Install" option. 4. A list of installed products will appear. The first item in the list, "A New Product", is highlighted. Press to select "A New Product". 5. Custom will now display your installation options. By default, "Entire Product" is highlighted. Press to select "Entire Product". 6. Custom will prompt you to insert "Distribution Floppy 1". Insert the enclosed diskette into the drive and press while "Continue" is highlighted. 7. After extracting some information from the diskette, custom will display information indicating that it is saving several files. Custom will once again prompt you to insert volume 1. Press while "Continue" is highlighted. 8. You will be prompted: "Do you wish to relink the kernel now? (y/n)" Enter "y" at this prompt. 9. After the relink of the kernel is complete, you will be prompted: "Do you want this kernel to boot by default? (y/n)" Enter "y" at this prompt. 10. Next, you will be prompted: "Do you want the kernel environment rebuilt? (y/n)" Enter "y" at this prompt. 11. After the kernel environment has been rebuilt, custom will prompt you to "Press any key to continue". Press . Custom will then display the message: "Checking file permissions...". 12. After completing these steps, you will be returned to the main custom menu. You may quit out of custom at this time. To reboot the system so that the changes take effect, type: /etc/reboot It should never become necessary to remove this SLS. However, should you need to do so, remove the SLS while in System Maintenance mode. Enter the command: /etc/custom Choose the menu selections: Remove -> UOD385A: Connection Drivers SLS -> ALL Follow the directions displayed on the screen to remove the SLS. During both the installation and removal of this SLS, you are asked to relink the kernel. If you should choose not to do so during the installation or removal process, execute the following commands at a later time while in System Maintenance mode: cd /etc/conf/cf.d ./link_unix To complete installation or removal of this SLS, answer "y" to the questions presented and then reboot your system with the command: /etc/reboot If you have any questions, please call our SCO Customer Services Department at (408) 425-4726. SCO Customer Service is available Monday through Friday, 6:00 A.M. to 5:00 P.M., Pacific Time. We appreciate your business. SCO Support Services