home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Vectronix 2
/
VECTRONIX2.iso
/
FILES_01
/
DEDGE103.LZH
/
EDGE
/
HELP
/
UNDEL.HLP
< prev
next >
Wrap
Text File
|
1993-07-25
|
7KB
|
153 lines
Diamond Edge Extendible Help System
File: UNDEL.HLP
Topics covered:
∙ Configuring Diamond Mirror
∙ Choosing your Undelete method
∙ Undeleting Files
∙ What to do after you undelete a file
∙ Configuring Diamond Mirror
One of the keys to successful recovery of deleted files is
knowledge of the FAT structure prior to deletion. Diamond Mirror
is an auto folder program provided to save FAT and directory
structure information at user specified intervals. Diamond Mirror
can be configured either from within Diamond Edge by selecting
Configure DMIRROR from the Undelete menu or by running
DMIRROR.PRG from the GEM desktop. The following items need to be
specified to configure Diamond Mirror:
∙ What drive to Mirror: Select the drives that you want Mirrored
by clicking on the appropriate drive buttons. You may select as
many or as few of your active devices that you want to Mirror.
∙ How often to Run Mirror: You can select to have Diamond
Mirror execute every time your machine is booted up, once per
day, or once per week. It is usually best to keep your Mirror
files reasonably current.
∙ Where to put your Mirror files: Specify the path that the
Diamond Mirror files will be stored.
After you are satisfied with your configuration, select Save
Configuration. If you want to exit without changing the existing
configuration, select Cancel.
If you are configuring Diamond Mirror from within
Diamond Edge, you can run Diamond Mirror by selecting Run
DMIRROR from the Undelete menu. If you are running Diamond
Mirror from the GEM desktop, you have the option of running
Diamond Mirror by selecting Run Mirror.
∙ Choosing your Undelete method
Two methods of recovering deleted files are provided by
Diamond Edge: Simple Undelete and Mirror Undelete. Select
Mirror Undelete if you have a recent Mirror file for the drive
that contains the deleted file. Otherwise, you should select
Simple Undelete.
A Simple Undelete calculates the number of clusters the
file would have occupied on the disk. Then it locates the
starting cluster of the deleted file and calculates the number
of consecutive clusters from the beginning cluster that are not
currently allocated to other files. These unused clusters are
then recovered.
A Mirror Undelete uses FAT and directory information stored
in the disk Mirror files to determine exactly what clusters the
file occupied prior to deletion The clusters that the file
occupied, that are still not allocated to other files, are
recovered. This is the only method that can fully recover a
fragmented file. Both of these methods can assist you in
recovering deleted files even if you regularly run DMIRROR.PRG.
∙ Undeleting Files
When you select Undelete Files from the Undelete menu,
the Undelete control screen is displayed. The Undelete File
Selector functions exactly like the normal GEM file selector,
except that only subdirectories and deleted files are shown.
To open a subdirectory shown in the control screen click on
the entry. To move up to the parent directory again, click on
the close box in the Undelete File Selector window. If you want
to change the active undelete drive, then select the desired drive
button from the available drive buttons.
Each file that appears in the Undelete File Selector has an
additional entry that indicates whether or not the file will be
recoverable. If all of the clusters belonging to a file can be
recovered then the recoverable entry is: Yes. If none of the
clusters belonging to the deleted file can be recovered, then
the recoverable entry is: NO. However, if only some of the
clusters belonging to the file are recoverable, then a ratio of
the recoverable clusters to the total number of clusters will be
shown.
Diamond Edge provides a general purpose deleted file finder
within the Undelete control screen. To search for deleted files
enter a deleted file search mask in the editable field in the
Undelete Control screen labeled Search Mask. You can search for
a specific file or enter a general purpose wildcard to find all
files that match the wildcard criteria.
The two standard wild cards on the Atari ST are * and ?.
The * appearing in a wild card search mask will backup all files
containing a character string in the *'s position. The ? appearing
in a wild card search mask will backup all files containing a
single character in the ?'s position.
For example, if you wanted to search for all deleted files with
a .PI1 extension., you would enter s*.PI1 for the Undelete Search
Mask. If you had wanted to search for all deleted files with
extension of PI1, PI2, or PI3 you would enter s*.PI? as the Undelete
Search Mask.
To initiate the deleted file search, select Find from the
Undelete Control Screen. You can also press the return key to
initiate deleted file search. The program will search the current
drive for the first file that matches the wildcard specification.
If a match is located, the Undelete File Selector will automatically
move to the directory containing the file and select the file.
If you want to find additional deleted files that match the current
wildcard mask, select Find Next from the Undelete Control screen.
To select a file to undelete, click on the file name in the
Undelete File Selector. When the entry appears selected it is
marked for undeletion. You may select as many files as you want
to to undelete in the same directory by holding the shift key down
while selecting the file. After you have selected all of the files
that you want to undelete in the current directory, then select
Undelete from the Undelete control screen.
For each file that you select you will be prompted to enter
the first character of the deleted filename. The program then
checks to see if there is another file in the directory that
already has that name. If a conflict is found, you will be prompted
to enter a different first character.
In order to undelete files from a subdirectory that has also been
deleted, you must first undelete the directory. When you have
finished undeleting all of the files that you require, select Cancel
to return to the Diamond Edge basic window.
∙ What to do after you undelete a file
After you have undeleted all of the files that you require,
you should verify the validity of the recovered files. If you have
a current validation file for the drive, then perform a validation
pass to assess the state of the undeleted files. This will tell you
if the undeleted file is the same as before or if the files data has
been corrupted. If you do not have a current validation file, then you
should manually examine the files you just undeleted to determine
if they are valid.