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DE.MAN
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1980-01-01
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Eldar Utilities Ver.1.00
D I S K E X A M I N E R
Eldar Software 1989
The Disk Examiner (DE) checks all clusters marked as "bad"
on a disk, are they really bad or not. It allow you to clean and
free pseudo-bad clusters on a disk created by some viruses.
Some of them (viruses) use such pseudo-bad clusters to keep their
code, some of them create such clusters as a side-effect, and that
could leads to the sufficient losses of disk space.
The only parameter of DE is the drive to be examined:
DE c:
DE check every "bad" cluster and tries to rewrite it
by zeroes. If there are some really bad sectors in that clusters
the DE writes on the screen:
Cluster #xxx is really bad.
If there no bad sectors then DE asks you:
Cluster #xxx is not really bad, mark as good ?(y/n)
If you'd answer Y (yes) then DE keep that your wish to the end
of work and, anyway, continue work. In the very end of work
you'll got the message:
### clusters marked as good.
Write changes to disk ? (Y/N)'
If you'd answer Y (yes) then and only then DE saves theses
changes on the disk. In the case of any other answer changes
will be lost. And after all DE gives you statistics of work:
### clusters marked "bad", ### clusters recovered.
Remember, that in the case of the non-stable error sector
could seems to be good while it is not. Don't mark such
sectors good and for the better guarantee use DE together and
before such utilities as Disk Test from Norton Utilities or
Compress function 3 (surface analysis) from PCTools, which
make the reverse task: verify all good sectors, are they really
good or not.
If you'd clean by DE sectors with the rest of viral code
(i.e. if your computer was infected by virus, which hide part
of his code in bad sector) then it could leads to the problems
with rebooting system from the hard disk. In this case use
some software specially designed to handle Master Boot and boot
sectors, e.g. BC (Boot Control) component of our AntiVirus system
Cassandra. It is possible to use some standard software also.
Reboot (cold) from the clean write-protected disk and restore
boot sectors using sys c: command. Master boot can be recovered
using ADM or similar software.
REMEMBER: If you are using standard software to recover
system areas you should be very careful !!!