OS/2 Shareware BBS: 11 Util/11-Util.zip/SHRED02.ZIP/SHREDDER.HLP

OS/2 Help File | 1991-01-23 | 25KB | 669 lines

ΓòÉΓòÉΓòÉ 1. Help for Help ΓòÉΓòÉΓòÉ

Shredder puts extensive help at your fingertips.  To get help, do any of the
following:

 o Press F1.  If an entry field, radio button, check box, etc. is currently
   highlighted, you'll see contextual help for that item.  If nothing is
   highlighted, you'll see general information about Shredder.

 o Press a Help button.  You'll get an explanation of the current data entry
   field, radio button, push button or check box.

 o Double-click on highlighted words or phrases in help windows.  Details about
   the topic will appear.


ΓòÉΓòÉΓòÉ 2. Keys ΓòÉΓòÉΓòÉ

Shredder uses no special keys, other than the standard ones associated with
Presentation Manager programs.


ΓòÉΓòÉΓòÉ 3. Extended Help ΓòÉΓòÉΓòÉ

This program is the electronic equivalent of a paper shredder.  It securely
erases files so they can never be reconstructed.

When you "delete" a file, the operating system simply erases the file's entry
in the disk directory--it doesn't actually destroy the file's data.  Thus,
people with the right software can later recover the material you thought was
gone forever. Shredder solves this problem by physically overwriting the data
before deleting the file.  Now you can rest assured your private data stays
private.  As an added bonus, you can customize Shredder to comply with your
organization's security standards.

For added security, Shredder automatically overwrites the unused space at the
end of each shredded file's cluster, to get rid of any sensitive data that may
be hiding there.  Shredder can also shred the "erased space" on an entire disk.


ΓòÉΓòÉΓòÉ 4. Insufficient Memory ΓòÉΓòÉΓòÉ

How much memory Shredder needs depends on what options you use and how many
files you want to shred.  If you see a message saying here is insufficient
memory, try closing down some other programs and retrying the operation.


ΓòÉΓòÉΓòÉ 5. Drives ΓòÉΓòÉΓòÉ

If you select one or more drives, Shredder erases files in all directories on
each selected drive.  If you don't select any drives, Shredder erases files
only in the current directory on the default drive.

To select or deselect a drive, click on the drive letter.  You may select
multiple drives simultaneously, if desired.  If you select any drives, the
current directory (displayed above the drives) disappears, indicating files
will be erased over one or more entire drives.  When no drives are selected,
the current directory reappears, indicating files will be erased only in that
directory.


ΓòÉΓòÉΓòÉ 6. Shredded File List ΓòÉΓòÉΓòÉ

The Shredded Files dialog box shows a list of files shredded during the current
session.  This is a temporary list, which disappears when you exit Shredder, or
when you press the Clear button.


ΓòÉΓòÉΓòÉ 7. Threads ΓòÉΓòÉΓòÉ

Shredder is a "multithreaded" program.  This capability, an advantage of OS/2
over DOS, means Shredder is designed to do more than thing at once.
Specifically, while file shredding is in progress, you can move the active
dialog box around, browse the help windows, or even run other programs.  If
you're shredding a large number of files (or the erased space on a large hard
disk), it may take some time.  While they're shredding, take the opportunity to
look at the help windows.


ΓòÉΓòÉΓòÉ 8. Technical Support ΓòÉΓòÉΓòÉ

Registered users may write to the author  for technical support.  In addition,
the author is sometimes available on Compuserve╨╣ (76430,1071).


ΓòÉΓòÉΓòÉ 9. View ΓòÉΓòÉΓòÉ

The "View" choice shows a list of the items shredded during this session with
Shredder.  This is a temporary list which is destroyed when you exit Shredder.
In contrast, the disk log lasts until you delete the log file.  The "View"
choice is disabled if there's no list to view (either because you haven't
shredded anything in the current session or because you erased the list with
the Clear button.)


ΓòÉΓòÉΓòÉ 10. File Menu ΓòÉΓòÉΓòÉ

The File Menu provides a way to terminate Shredder.  Choose the Exit option.


ΓòÉΓòÉΓòÉ 11. Hidden Files ΓòÉΓòÉΓòÉ

A "hidden" file does not appear in normal directory listings.  If you choose
"Hidden," Shredder includes hidden files in its erasure operations.  Otherwise,
it ignores these files.

This option is available only if there's an entry in the Files to Shred field.

CAUTION:
Use this option with care.  Hidden files usually need special protection.
Inadvertently deleting critical files might damage your software or operating
system.  If in doubt, check the Pause box.


ΓòÉΓòÉΓòÉ 12. Read Only Files ΓòÉΓòÉΓòÉ

Normally, you can't change or delete "read only" files.  However,  if you
choose "Read Only," Shredder includes read only files in its erasure
operations.  Otherwise, it ignores these files.

This option is available only if there's an entry in the Files to Shred field.

CAUTION:
Use this option with care.  Read only files usually need special protection.
Inadvertently deleting critical files might damage your software or operating
system.  If in doubt, check the Pause box.


ΓòÉΓòÉΓòÉ 13. Pause for Special Files ΓòÉΓòÉΓòÉ

 If you check "Pause," Shredder stops each time it finds a hidden or read only
file and asks if you really want to shred it.  This safety feature reduces the
chance of accidentally deleting important system files.

This option is available only if the Hidden or the Read Only box is checked.


ΓòÉΓòÉΓòÉ 14. Overwrite Codes ΓòÉΓòÉΓòÉ

The "Codes" field lists the ASCII codes of characters used to overwrite (thus
destroying) the data in a file.  Enter the codes (0-255), separated by spaces.
Don't include any decimal points or signs (+ or -). Shredder overwrites the
file with each character specified during each pass.

Unless you a have a good reason not to, we recommend you accept the default
codes.


ΓòÉΓòÉΓòÉ 15. Overwrite Passes ΓòÉΓòÉΓòÉ

The "Passes" field tells how many times Shredder overwrites files.  Unless you
a have a good reason not to, we recommend you accept the default number.


ΓòÉΓòÉΓòÉ 16. Copy Before ΓòÉΓòÉΓòÉ

You can make archival copies of files before shredding them, if you like.  For
example, you might want to back up your files onto a diskette before erasing
them from a hard disk.  If you check "Copy Before...", Shredder asks where to
copy the files to before shredding them.  The backup copy of the file remains
intact; only the original copy is shredded.

This option is available only if there's an entry in the Files to Shred field.


ΓòÉΓòÉΓòÉ 17. Log ΓòÉΓòÉΓòÉ

If you check "Disk Log," Shredder stores the names of the shredded files in a
file called SHREDDED.TXT.  This is a permanent list (as long as you don't
delete or overwrite SHREDDED.TXT), unlike the list displayed with the View
choice, which lasts only until you exit Shredder.  When you start shredding, if
the Disk Log box is checked and SHREDDED.TXT already exists, Shredder asks if
you want to erase the previous contents before storing the new data.


ΓòÉΓòÉΓòÉ 18. Keep After ΓòÉΓòÉΓòÉ

If you check "Keep After," Shredder won't delete the file from the disk after
overwriting it.  This lets you examine the file to verify its contents have
been destroyed.  If you don't check "Keep After," the file is automatically
deleted after being overwritten.

If you tell Shredder to keep files, you may notice file sizes increase after
the overwrite.  This is because Shredder rounds up file sizes to an integral
multiple of the cluster size.

This option is available only if there's an entry in the Files to Shred field.


ΓòÉΓòÉΓòÉ 19. About ΓòÉΓòÉΓòÉ

The "About" option on the Help menu displays the program version,  copyright,
and author data.


ΓòÉΓòÉΓòÉ 20. Clear Button ΓòÉΓòÉΓòÉ

Pressing the "Clear" button in the Shredded Files dialog box erases the list of
shredded files currently displayed, then closes the dialog box.  Although the
file list is erased, the disk log (if you're keeping one) is unaffected.

Normally, you would only invoke this function if you reach the maximum file
limit and want to shred more files.


ΓòÉΓòÉΓòÉ 21. Partial File List ΓòÉΓòÉΓòÉ

When you see a message saying Shredder can't show the entire list of shredded
files, it's because the operating system has reported it can't accommodate the
whole list.  The most common cause of this problem is insufficient memory.  If
you're running other applications, you might close them down and try to view
the file list again.


ΓòÉΓòÉΓòÉ 22. Directory ΓòÉΓòÉΓòÉ

A "directory" is a group of related files on a disk.  (If you're unfamiliar
with this term, please see your operating system user's manual.)  Shredder has
various options that affect which directories it works in.  Individual items
under this topic have further information.


ΓòÉΓòÉΓòÉ 23. AUTO ΓòÉΓòÉΓòÉ

If you start Shredder with the optional "AUTO" parameter, the program starts
shredding files according to the current settings,  and terminates
automatically when finished.  (The initial default settings shred all files in
the current directory.)  This eliminates the need for manual intervention (see
below for exception), so you can run Shredder from batch files.  However,  we
do not recommend using the "auto" parameter until you have a working
familiarity with the program.

To use this option, enter the following from the command line:

 SHREDDER AUTO

 Or, you can put AUTO in the Parameters field of the Properties dialog box when
 you put Shredder into a Program Manager window.

 Shredder uses the settings stored in the SHREDDER.INI file.  If you'd like to
 use the AUTO parameter with different settings for different situations,
 simply start SHREDDER in different directories, each with its own SHREDDER.INI
 file.  If SHREDDER.INI isn't in the current directory, Shredder will create it
 in the current directory.

 Although the AUTO parameter normally starts and terminates Shredder with no
 further action on your part, Shredder will pause if

 o It encounters errors.

 o A situation occurs where Shredder needs your input (e.g., it has to ask if
   you want to overwrite a previous log file).

 In other words, completely unattended operation is not always possible.
 Testing your batch file is the only way to know for sure.


ΓòÉΓòÉΓòÉ 24. Environment ΓòÉΓòÉΓòÉ

If you desire, Shredder will use the DPATH environment variable to find the
help file (SHREDDER.HLP) .  The help file must be in either the current
directory, or in a directory shown in the DPATH list.  If you're using multiple
SHREDDER.INI files (in conjunction with batch files), it would be advantageous
to keep a single SHREDDER.HLP file in a directory specified by DPATH.


ΓòÉΓòÉΓòÉ 25. Roundup ΓòÉΓòÉΓòÉ

When overwriting a file, Shredder first increases its size to an integral
multiple of the cluster size.  If you don't know what a cluster is, don't
worry.

For the technically inclined, this procedure ensures Shredder overwrites any
sensitive data that might be hidden at the end of the cluster, beyond the
physical end of the file.  This data is not part of the file itself, but can
come from various sources,  such as previously erased files.

If you see a message saying Shredder couldn't shred to the end of the cluster,
OS/2 refused to let Shredder change the file's size,  for unknown reasons.


ΓòÉΓòÉΓòÉ 26. Exiting ΓòÉΓòÉΓòÉ

You exit Shredder by choosing "Close" on the system menu,  choosing "Exit" on
the File Menu, pressing the Cancel button, or pressing Escape.


ΓòÉΓòÉΓòÉ 27. Save ΓòÉΓòÉΓòÉ

Choosing "Save" on the Options Menu stores the current settings for reuse
later.  The next time you run Shredder, the same settings are displayed.


ΓòÉΓòÉΓòÉ 28. Registration ΓòÉΓòÉΓòÉ

If you use Shredder for more than 30 days, you must register your copy.  Not
only is registration a legal requirement, but registration fees give shareware
authors the incentive to develop new software and improve old ones.  To
register, send U.S. $20.00 to the author (double-click on "author" for
address).  If you wish to receive a disk with the latest copy of Shredder,
include an additional U.S. $5.00 (total of U.S. $25.00) with your registration,
to cover shipping and handling costs, and specify disk type.  Prices are
subject to change without notice.


ΓòÉΓòÉΓòÉ 29. Files to Shred ΓòÉΓòÉΓòÉ

In the "Files to Shred" field, enter the specification of the files you want
shredded.  You can enter more than one file specification, separated by spaces.
If desired, you may include drive, directory, and wild card characters (* and
?).  Entering "*.*" indicates you want all files shredded.

Shredder will erase files meeting your specifications in either the current
directory, or across one or more entire drives.  The current field labels in
the dialog box show which will occur.


ΓòÉΓòÉΓòÉ 30. Cancel Button ΓòÉΓòÉΓòÉ

Pressing the "Cancel" button in a dialog box closes the box without saving any
changes you may have made in the box.


ΓòÉΓòÉΓòÉ 31. Help Button ΓòÉΓòÉΓòÉ

Pressing the "Help" button in a dialog box shows information about the
currently selected entry field, radio button, push button, or check box.


ΓòÉΓòÉΓòÉ 32. Files ΓòÉΓòÉΓòÉ

A "file" is a collection of data on a disk.  (If you're unfamiliar with this
term, please see your operating system user's manual.)  Shredder has various
options that affect which files it works on. Individual items under this topic
have further information.


ΓòÉΓòÉΓòÉ 33. Overwriting ΓòÉΓòÉΓòÉ

"Overwriting" is the process of replacing the current contents of a file with
new contents (erasing the old contents).  This how Shredder achieves its
security.  Shredder has a number of options that affect how it performs
overwriting.  Individual items under this topic have further information.


ΓòÉΓòÉΓòÉ 34. Shareware ΓòÉΓòÉΓòÉ

The "shareware" concept is "try before you buy."  The author provides a copy of
the software for your use on a trial basis.  If you decide it doesn't meet your
needs, throw it away and never pay a dime.  On the other hand, if you want to
keep using the software, you officially register your copy and pay for it.

The shareware concept greatly reduces advertising and distribution costs,
letting us offer you quality software at rock bottom prices.  Since you try
before you buy, you're guaranteed to get exactly what you need.  If you ask,
"Why should I bother to register?", read on.

First, registration gives you the most current version of Shredder.  Second,
you become eligible for technical support.  Third, there is both a moral and
legal obligation to do so.  Fourth,  registration fees encourage software
authors to improve old programs and develop new ones.  And finally, registered
users are eligible for free copies of future versions of Shredder if they
submit suggestions which are adopted.


ΓòÉΓòÉΓòÉ 35. Author ΓòÉΓòÉΓòÉ

Shredder was written by Richard W. Adams.  You can reach the author at the
following address:


    104 Willow Oaks Boulevard
    Hampton, VA  23669-1528

 In addition, the author is sometimes available on Compuserve╨╣  (76430,1071).


ΓòÉΓòÉΓòÉ 36. Church Use ΓòÉΓòÉΓòÉ

Tax exempt Christian religious organizations (e.g., churches) are eligible for
free use of Shredder for official business.  Send a written request to the
author, and you'll receive registration forms.  The registration takes effect
when you complete and return the forms.  This is a charitable donation.


ΓòÉΓòÉΓòÉ 37. License Agreement ΓòÉΓòÉΓòÉ

When you register your copy of Shredder, you receive the perpetual right to use
your copy of the program.  However, The author retains ownership of the
software, which is protected by United States copyright laws and international
treaties.

You may copy and distribute this software freely if you:

 o Include all constituent files (double-click on "File List" for list)

 o Don't change the software or documentation in any way

 o Charge no fee other than a nominal one to cover distribution costs

 o Don't distribute the software for commercial purposes without written
   permission from the author.

 o Don't rent or lease a copy of the software

 This software is provided "as is."  There is no warranty, implicit or
 otherwise.  You assume the entire risk as to the results and performance of
 the software.  The author does not guarantee compatibility with your system
 and is not responsible for any damages incurred by use of this software.

 The author disclaims all warranties, either express or implied, including but
 not limited to implied warranties of merchantability and fitness for a
 particular purpose, with respect to the software and written materials.  In no
 event shall the author be liable for any damages whatsoever (including without
 limitation damages for loss of business profits, business interruption, loss
 of business information, and the like) arising out of the use of or inability
 to use this product, even if the author  has been advised of the possibility
 of such damages.  Because some states don't allow the exclusion or limitation
 of liability for consequential or incidental damages, the above limitation may
 not apply to you.

 Use of this software constitutes agreement to these terms.


ΓòÉΓòÉΓòÉ 38. File List ΓòÉΓòÉΓòÉ

Shredder comes with the following files:

 File                Contents
 SHREDDER.EXE        Main program
 SHREDDER.HLP        On line help (must be in current directory or locatable
                     via DPATH)
 README              Introduction
 REGISTER.DOC        Software registration form
 CATALOG.DOC         Other OS/2 and DOS software by the same author

 Shredder creates the following files:

 File                Contents
 SHREDDER.INI        Program defaults
 SHREDDED.TXT        List of shredded files (if Log option chosen)


ΓòÉΓòÉΓòÉ 39. Free Copies ΓòÉΓòÉΓòÉ

If you're the first registered user to make a particular suggestion for
improving Shredder (or to report a specific bug), and your suggestion is
incorporated (or the bug is fixed) in a future version of Shredder, you're
eligible for a free copy of that future version.  Please send any suggestions
or bug reports to the author.  Comments are welcome at any time.  Your input
makes good programs even better.


ΓòÉΓòÉΓòÉ 40. Reset ΓòÉΓòÉΓòÉ

Choosing "Reset" on the Options Menu sets all entry fields, radio buttons and
check boxes to the values last saved (or the defaults, if you've never saved
new values).  Note the difference between this and "Default."


ΓòÉΓòÉΓòÉ 41. Erased Space ΓòÉΓòÉΓòÉ

If you check "Erased Space," Shredder overwrites the space on the selected
disks which contains previously erased files.  This eliminates any sensitive
data which may be hiding there.  Shredder uses the same overwrite codes and
number of passes as for shredded files.

Shredder can shred the erased space on disks up to 4GB in size.  On a large
hard disk, this can take some time.  The process does not overwrite bad or
hidden sectors.  Any data in these sectors remains unchanged.  Normally,
though, OS/2 flags these type sectors when it first formats the disk, so no
data is ever written to them.  In other words, you usually don't have to worry
about sensitive data lurking there.

This option is available only if you select specific drives.


ΓòÉΓòÉΓòÉ 42. Default ΓòÉΓòÉΓòÉ

Choosing "Default" on the Options Menu sets all entry fields,  radio buttons
and check boxes to their standard values.  Note the difference between this and
"Reset."


ΓòÉΓòÉΓòÉ 43. Cancel Button ΓòÉΓòÉΓòÉ

Pressing the "Cancel" in the Shredding dialog box stops the shredding process.
Any files already shredded are unrecoverable.


ΓòÉΓòÉΓòÉ 44. Begin button ΓòÉΓòÉΓòÉ

Pressing the "Begin" button begins shredding the specified files.  To have the
program automatically begin shredding without manual intervention, see the help
window on the Auto option.


ΓòÉΓòÉΓòÉ 45. Default Overwrite Codes ΓòÉΓòÉΓòÉ

The default overwrite codes are designed to toggle each binary bit in the
shredded file at least three times.  The final overwrite code is a solid block
character, to help visual verification of data destruction.


ΓòÉΓòÉΓòÉ 46. Defaults ΓòÉΓòÉΓòÉ

See individual topics under this heading.


ΓòÉΓòÉΓòÉ 47. Programming Tools ΓòÉΓòÉΓòÉ

Shredder was written in the C programming language, using PC-Write, version
3.02.  It was compiled with the Microsoft╨╣ C Optimizing Compiler, version 5.1.


ΓòÉΓòÉΓòÉ 48. Copyright ΓòÉΓòÉΓòÉ

Shredder is copyright Γòò 1991 by Richard W. Adams.  Portions of the library code
are copyright Γòò Microsoft╨╣ Corporation,  1984-1988.  All rights reserved.  This
is a shareware program, and copying is permitted (and even encouraged) in
certain circumstances.  See the help window for terms of the software license.


ΓòÉΓòÉΓòÉ 49. Verify Filespec ΓòÉΓòÉΓòÉ

If you enter a global file specification (*.*) and select one or more drives,
Shredder asks you to verify that this is what you intend.

CAUTION:
Answer this question with care.  If you say yes, Shredder erases all files on
the specified drives.


ΓòÉΓòÉΓòÉ 50. Profile File ΓòÉΓòÉΓòÉ

When you exit Shredder, the program saves the settings you used in the various
dialog boxes in a "Profile File" (SHREDDER.INI).  The next time you use
Shredder,  it reads those settings, giving you a consistent environment each
time you run the program.


ΓòÉΓòÉΓòÉ 51. Erase Failure ΓòÉΓòÉΓòÉ

There are several reasons why Shredder may be unable to erase a file.  The most
common are sharing violations (another program using the file, or the share
buffer overflowing) or a drive being locked.  A hidden or read only attribute
doesn't cause erasure to fail.

Press "Abort" to stop shredding altogether, "Retry" to attempt the erasure
again, or "Ignore" to skip this file.


ΓòÉΓòÉΓòÉ 52. Copy Destination ΓòÉΓòÉΓòÉ

In the Copy Destination dialog box, enter the name of the drive,  directory,
file, or device you want files copied to before shredding.  You may use any
valid OS/2 device name, such as COM1 (communications port) or PRN (printer).
Don't use wild card characters (* and ?).

If the destination is a file, Shredder adds each shredded file in sequence to
the end of the file, giving one combined file.  (If the file already exists,
Shredder first asks if you want to overwrite the current contents.)

If the destination is a drive or directory, Shredder puts a separate copy of
each shredded file there, keeping the original file names.

Note:  If you have a parallel printer, using the device name "PRN" gives you a
hard copy printout of the shredded files.  If you have a serial printer, use
"COM1" (or "COM2," or whatever), instead.


ΓòÉΓòÉΓòÉ 53. Shredding ΓòÉΓòÉΓòÉ

While shredding is in progress, a dialog box shows the item currently being
processed, and a colored bar showing the fraction shredded so far.  When the
bar turns completely green, shredding is done.

While you're shredding the erased space  on a disk, no other program will be
able to write additional data to the disk (though they can read or update
existing data).

You may press Cancel to stop shredding at any time.


ΓòÉΓòÉΓòÉ 54. OK Button ΓòÉΓòÉΓòÉ

Pressing the "OK" button in a dialog box accepts the current entries and closes
the box.


ΓòÉΓòÉΓòÉ 55. Existing File ΓòÉΓòÉΓòÉ

You named an existing file as the copy destination.  If you want to overwrite
its contents (destroying them), push the "Yes"  button.  If you press "No",
Shredder adds the copied files to the end of the destination file, preserving
its current contents.  To re-enter the file name, press "Cancel."


ΓòÉΓòÉΓòÉ 56. Copy Failure ΓòÉΓòÉΓòÉ

There are several possible reasons Shredder may be unable to copy a file before
shredding it.  The most common cause is insufficient disk space.  Other
possible errors (usually caused by actions of other programs) include sharing
violations and locked drives.  Press "Abort" to stop shredding files, "Retry"
to attempt the copy again, or "Ignore" to shred the file without copying it
first.


ΓòÉΓòÉΓòÉ 57. Maximum Files ΓòÉΓòÉΓòÉ

The amount of free memory determines the maximum number of files Shredder can
handle at once.  When you reach that number, the program shows a message and
stops.  This does not mean you can't shred any more files, just that Shredder
can't show a larger list.  To shred more files, press the Clear button,  in the
Shredded Files dialog box.


ΓòÉΓòÉΓòÉ 58. Failure to Open Log ΓòÉΓòÉΓòÉ

If Shredder can't open the disk log file for any reason, it displays an error
message.  Possible causes for this situation are the file being marked as read
only, or its being used by another process.


ΓòÉΓòÉΓòÉ 59. Previous Log ΓòÉΓòÉΓòÉ

If you want to keep a disk log and a previous log (a file named SHREDDED.TXT)
exists, Shredder asks if you want to overwrite it.  If you answer Yes, the
previous contents of the log file are destroyed.  If you answer No, the new
data is appended to the end of the log file.  If you choose Cancel, shredding
is aborted.


ΓòÉΓòÉΓòÉ 60. What to Shred ΓòÉΓòÉΓòÉ

When specifying what item(s) are to be shredded, you must either enter a file
specification in the "Files to Shred" field, or you must check the "Erased
Space" box, or you can do both.


ΓòÉΓòÉΓòÉ 61. Shredding Entire Disks ΓòÉΓòÉΓòÉ

To shred everything on a disk, do the following:

 o Enter "*.*" in the "Files to Shred"  field

 o Select the drive(s) you want to shred

 o Check "Erased Space"

 o Check "Hidden" and "Read Only" files

 o Push the "Begin" button.

 Note:  Due to the design of OS/2, Shredder can't erase operating system files
 on the boot drive (usually drive C:).  Normally, you wouldn't want to shred
 system files, since they contain only software.  However, if you do want to
 shred these files, you'll need to boot your machine from a different drive
 (e.g., from diskette).  In addition, Shredder doesn't overwrite any bad or
 hidden sectors on a disk.


ΓòÉΓòÉΓòÉ 62. Drive Problems ΓòÉΓòÉΓòÉ

Common causes of drive problems include open door, no disk in drive, disk in
backward, unformatted disk, etc.  Correct the problem and press "Retry".  Or,
you may press "Ignore" to bypass the drive, or "Abort" to stop shredding
altogether.