HP e3000 MPE/iX System Software Maintenance Manual (Release C.75.00) (30216-90344)

Appendix D
Backdating Your System
Planning Your Backdate
194
Planning Your Backdate
Planning can and should be done prior to performing your backdate. The backdate requires downtime and
planning it ensures that all the requirements are met. The sections include:
• Determine Your Backdate Method
• Verify Your Requirements
• Compatibility Issues
• Patch Considerations
• Check Patch Tape Media
• Validate Your System Backup (Method 1)
•Check for Disk Space
Determine Your Backdate Method
There are essentially three methods for backdating your system software version level. The methods are as
follows:
• Method 1: Using a Customized System Load Tape (CSLT) together with the Fundamental Operating
System (FOS) and Purchasable Products (SUBSYS) tapes from the earlier release.
The CSLT you use to backdate your system could have been created under many different circumstance.
For example:
— During a system update (with no patches)
— While installing patches from a PowerPatch tape
— While updating and installing patches from a PowerPatch tape
• Method 2: Using Factory System Load Tape (SLT) and Fundamental Operating System (FOS) and
Purchasable Products (SUBSYS) tapes from the earlier release.
• Method 3: Using a Factory Preload Tape (FPT). If your system was preinstalled at the factory, you must
backdate using the FPT.
The system software version level options are:
• Backdate from 7.5 to 7.0
• Backdate from 7.5 to 6.5
• Backdate from 7.5 to 6.0
NOTE Backdating from 7.5 to a release before 6.0 (General Release) is not supported.
To determine which method is optimal for your system and your situation, call the Response Center, if you
have a software support contract, or your HP representative, before deciding to backdate your system.
If your Hewlett-Packard representative and you both agree that backdating your operating system is
necessary, follow the steps below. Please read all the instructions in this chapter before you begin your
backdate. Determine what prior IO devices to which you will backdate.