HP e3000 MPE/iX Release 7.0 System Software Maintenance Manual (30216-90317)

290 AppendixG
HP Stage/iX Reference
HP Stage/iX Concepts
HP Stage/iX Concepts
Your operating system normally resides in what HP Stage/iX calls the Base . The Base is
the set of files laid down by the last UPDATE or INSTALL, and RESTORE from tape. The “base
location” or “natural location” is where a file officially resides (for example, NL.PUB.SYS).
HP Stage/iX creates, fills, and validates
staging areas . A staging area is an HFS
directory: /SYS/hpstage/
stage_name . It is located on disk and contains only the files of
the OS that change as a result of applying a set of patches. As needed, using the HP
Stage/iX SET command, you
activate your system software to boot from either the Base
or a designated staging area.
Creating and Activating a Staging Area
When you boot your system from a staging area, HP Stage/iX:
1. Creates a Base file archive.
2. Moves the affected Base files to the archive:
/SYS/hpstage/ base_archive .
3. Moves the staging area files to their Base location.
4. Boots the system using the staging area files.
Much of the disk space used by the staging area and the archive is on LDEV 1. When the
system is booting from the Base files, the archive area is empty. When the system is
booting from the staging area files, the staging area is empty. The amount of disk space
used depends on the set of patched files. Refer to Figure G-1. for more information.
Figure G-1. Creating and Activating a Staging Area
Backing Out a Staging Area
To backout the changes from a staging area, use the HP Stage/iX SET command to
designate the Base instead of the staging area. When you use the SET command to backout
OS in Base
Introduce patches
Create staging
area.
Contains copies of
changed OS files
Phase II
Activate Staging
Move staging area files to Base
location. Reboot starts system
with stage_1 changes.
archive
Copy Base files
that are replaced
with changed
files to the
Phase I
Create Staging
patches
stage_1
Staging area
empty.
stage_1