HP e3000 MPE/iX Release 6.5 System Software Maintenance Manual (30216-90325)

Chapter 3 69
Planning for Your Task
3.6 Estimating Disk Space
3.6 Estimating Disk Space
Read the subsections in this section:
• Non-Contiguous Disk Space Requirements
• Contiguous Disk Space Requirements
• Disk Space Error Messages
Before you begin to modify your system software make sure that you have enough disk
space to update your system. Modifying system software includes: updating the version,
reinstalling your system software, adding on purchased products from the SUBSYS tape,
or applying patches. There are three types of disk space requirements that are referenced
during the modification process:
• Permanent (net) amount of non-contiguous disk space
required for the system software after it is modified.
• Maximum (peak) amount of non-contiguous disk space
required during the system software modification process.
• Amount of contiguous disk space
that the UPDATE tool requires to modify the system software.
NOTE The disk space values listed in this section are maximum estimated values
only. The actual amount of disk space used on your system will vary.
Non-Contiguous Disk Space Requirements
Table 3-5. “Non-Contiguous Disk Space Sectors,” lists the amount of non-contiguous disk
space sectors required for the three operating system components (SLT, FOS, SUBSYS)
and PowerPatch of the currently supported versions of the operating system software.
During the modification process, some files are duplicated temporarily, and sometimes
older versions of files are retained temporarily. This causes the “in process” (or peak)
amount of disk space usage to be greater than the “final” (or net) amount of disk space
usage when the modification is complete.
You must have the peak amount of disk space available on your system during the process
to successfully modify your system.
The combined System Load Tape (SLT) and Fundamental Operating System (FOS) are the
minimum requirements for any system software version. Ensure that you have enough