Disaster Recovery Planning
No one is safe from disaster. A disaster can be a fire that burns your company building to the ground, a flood, an earthquake, a major system failure, or even
Backing up is not enough to protect yourself from disaster. In the event of a fire or earthquake, having tapes with everything you ever had on the system doesn't do you any good if you don't have a system to restore them to. Therefore, you must
A discussion of such a plan (or even a complete definition) is beyond the scope of this book. Firms exist whose primary business is providing a disaster recovery plan for computer users. You should contact one of them immediately.
A well-implemented disaster recovery plan can offer you a replacement system that will be available if your system becomes unusable. The disaster recovery supplier charges a fee for this service, but you can look at it as a form of insurance. The provider works with you and helps you design a good disaster recovery plan.
Using Save Files
When you perform save and restore operations,
you can use save files instead of tapes. Save files are objects of
type *FILE that reside on disk. They offer faster
On the other hand, save files use up (at least
temporarily) space on your disk
Using Save Files
To use a save file instead of tape, you must create the save file first, using the Create Save File (CRTSAVF) command. For example:
CRTSAVF FILE(MYLIB/MYSAVF) TEXT('Save file for backups')
To save to the save file, execute the usual save
command, except specify DEV(*SAVF) and the
SAVLIB LIB(ACCTG) DEV(*SAVF) SAVF(MYLIB/MYSAVF)
This command saves the entire ACCTG library in save file MYSAVF in library MYLIB.
At your leisure, some time after this SAVLIB
command ends, you can save the save file to tape and clear the save
SAVSAVFDTA SAVF(MYLIB/MYSAVF) DEV(SYSTAP01) FILE(MYLIB/MYSAVF)
If you need to restore the ACCTG library from
this tape, use the regular RSTLIB command. The system will not care
that you used a save file in the process. If you can afford the
space on your disk, you may be tempted to leave the save file full
of data and never perform the backup to tape. In this case, the
RSTLIB command would have to specify DEV(*SAVF) SAVF(MYLIB/MYSAVF).
However, with this method, you do not have an external backup that
you can keep in a safe place. If your disk crashes and must be
Chapter 7: Operational Assistant
The System/38 is the AS/400's predecessor.
CPF, the S/38's operating system, has always been
IBM developed Operational Assistant (OA) in order
to make the AS/400 even easier to
OA is comprised of a series of