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Q: Can anyone run the LFDS detection tool?
A: When run in "normal mode" only people logged on as a user with system
manager (SM) capability may run the LFDS detection tool. When run in "install
mode" the person running the tool must be logged on as the user "MANAGER.SYS".
Q: Can I run the LFDS detection tool any time I wish?
A: If data is frequently restored to your system from other systems it would
be wise to periodically run the detection tool to see whether any LFDS capable
C.10.xx version databases have been restored to your system. You should try to
run the LFDS detection tool when databases on your system are not being accessed
or are opened in a sharable mode (modes 1,2,4,5,6 or 8) so that the LFDS detection tool can also open
them for shared, read access.
Q: If I have systems on different MPE releases, which systems must I be sure to
run the LFDS detection tool on?
A: You should run the LFDS detection tool on any system running TurboIMAGE
versions C.10.03 through C.10.09 or on any system that had been
running one of these versions. When it doubt, run the tool.
Q: Should I run it in "install mode" or in "normal mode"?
A: You should always run the LFDS detection tool in "normal mode" unless you
have been instructed to re-run it in "install mode" to correct a problem that
may have occurred during patch installation.
Q: What happens if the LFDS detection tool fails to run correctly during
installation of TIXMXW7 (or superseding patch)?
A: The patch will still install correctly. However, you will need to address
the reason why the tool failed to run and re-run the tool using "install mode"
at your earliest convenience. The most common cause for the tool failing to run
to completion would be if it could not access ALL the databases on your system.
This could happen if some were open MODE 3 or MODE 7, or if they were opened
exclusively by a database management utility or other system operation.
Q: When does the LFDS detection tool create the "HPNOLFDS" file?
A: The LFDS detection tool will create the HPNOLFDS file in the PUB group of
the SYS account when the tool is run using "install mode" and when it has found
NO LFDS capable C.10.xx databases on your system.
Q: What happens if the HPNOLFDS file is purged?
A: The file is protected so it should not be possible to accidentally purge
it. If it is purged then the C.10.10 TurboIMAGE code will assume there are LFDS
capable C.10.xx databases on the system and permit writes to them. If there are
no such databases on your system then no harm will be done. However you would
need to re-run the LFDS detection tool using "install mode" at your earliest
convenience to recreate the HPNOLFDS file.
Q: If the HPNOLFDS file is purged can't I just build it?
A: No, the file has unique attributes and content that identify it as coming
from the LFDS detection tool. Simply building a file with that name will not
prevent TurboIMAGE from allowing writes to LFDS capable C.10.xx databases if
such databases exist on your system.
Q: What would happen if I already had a file called HPNOLFDS on my system
from another source?
A: The chances of that are fairly small but not zero. If the LFDS detection
tool discovers a file called HPNOLFDS on your system that was NOT created by a
prior run of the tool it will do nothing if it
had already discovered LFDS capable C.10.xx databases on your system. This is
because this foreign file will not disable writes from TurboIMAGE. However, if
it has found NO LFDS capable C.10.xx databases on your system it will issue a
lengthy message to STDLIST and to the system console, if run in batch mode
informing you of this. You will need to determine how the file came to be there
and move it if possible. Once this foreign file is moved or purged you will need
to run the LFDS detection tool in "install mode" again to ensure that the
HPNOLFDS file recognized by TurboIMAGE is created.
Q: Can I run the LFDS detection tool on any release of MPE/iX?
A: Yes, the tool does not change any of your databases. The tool has been
tested on MPE/iX 6.5, 7.0 and 7.5. No release prior to MPE/iX 6.5 supported LFDS
so there is no reason to run it on those.
Q: I decided to download and install the version of DBSCHEMA that prevents
creating an LFDS database, should I run the LFDS detection tool and if so, in
what mode?
A: This version of DBSCHEMA will prevent you from accidentally creating an
LFDS capable database on C.10.xx but to be sure you have no existing LFDS
capable databases you should run the LFDS detection tool in "normal mode". Since
you have not yet installed the TIXMXW7 (or superseding) patch you do not yet
have the code that can prevent writes to an LFDS capable C.10.xx database if the
HPNOLFDS file is present so there is no value in running the LFDS detection tool
in "install mode".
Q: What if I do run it in "install mode" with just the DBSCHEMA replacement?
A: No harm, the HPNOLFDS file will be built in PUB.SYS and will not cause any
change in the behavior of TurboIMAGE. When you do finally install the TIXMXW7
(or superseding) patch the LFDS detection tool will see that the existing copy
of HPNOLFDS was created by the tool so it will purge that old copy and create a
new one.
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