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Text File | 1994-12-18 | 11.8 KB | 258 lines | [TEXT/MSWD] |
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- Burn
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- Version 2.2 Users Manual
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- Privacy for Everyone
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- Released January
- 1995
- About Burn
- No data security system would be complete without
- a way to destroy the original versions of a file
- after they are encrypted. Burn provides exactly
- that function. It is a drag-and-drop application
- under system 7. Files and folders dragged onto
- the Burn icon will be overwritten a user selected
- number of times with a user selected pattern, then
- renamed, then deleted. Both data and resource
- forks are deleted.
- A variety of options allow you to configure the
- application to exactly the ease of use and
- security you need. No matter what options you
- select, your trash will be far more secure than if
- you used Apple's built in trash capabilities.
- This application is not a replacement for the
- trash can. You should continue to drag
- unimportant documents and applications to the
- trash can. When you drag a file to the Burn icon
- it will be irretrievably deleted.
- System Requirements
- This application requires System 7, about 100k of
- disk space, and 256k of RAM. If you still use
- System 6 contact the author for a version
- compatible with your operating system.
- What's new in version 2.2
- Version 2.2 adds significant new features to Burn:
- • Folders can now be deleted in their entirety
- using Burn. Simply drag a folder or folders to
- the Burn Icon (or select "Delete..." from the
- File Menu) every file in the folders will be
- irretrievably deleted.
- • Speed has been nearly doubled.
- • Preferences are now saved in the system folder
- instead of internally to the application which
- provides better network support and works more
- as the user would expect.
- • Burn can now be placed in the background while
- burning items.
- • Files are now deleted to their physical end of
- file instead of their logical end of file.
- How to Destroy a File or Folder
- To destroy a file or folder simply drag the
- desired item to the Burn icon and release the
- mouse button. The item will be overwritten and
- deleted.
- You can also destroy a file or folder by double
- clicking on the Burn application and then
- selecting "Delete..." from the file menu. You
- will be prompted to select an item for
- destruction.
- Warning: Burn does not handle alias's the same way
- the trash icon in the Macintosh Finder does. If
- you drag an alias record to Burn (or open an alias
- from within the application) the ORIGINAL file
- will be destroyed, not the alias.
- Erasing Free Space on a Volume
- Burn allows you to erase the contents of the free
- sectors on your disks. This option is useful if
- you accidentally erased a sensitive file using the
- regular trash can, or if a file was deleted within
- an application. It is very safe because what it
- does is create a temporary file the size of the
- free space on your disk, and then burns that file.
- Thus there is no risk of Burn wandering off into
- parts of your hard disk that it should not venture
- (well almost no risk, see the next paragraph).
- Warning: Disks with a damaged directory can be
- further damaged if you Burn the free space. Be
- certain your disks are healthy by running a
- utility program such as Apple's Disk First Aid
- before using Burn's Erase Free Space command.
- To use this feature select "Clean Disk Free
- Space..." from the file menu. It will prompt you
- to select a volume to clean. A status dialog will
- show the progress of the cleaning.
- For maximum security you should periodically
- select this option.
- Configuring the Application
- The "Preferences..." option under the file menu of
- Burn allows you to customize the behavior of Burn
- to suit how you use it. Below each option is
- described in detail.
- Confirm Deletes
- This option, if selected, will cause Burn to ask
- you to confirm the destruction of each file. It
- provides a "Delete All" button in the dialog box
- to bypass further confirmations if you are
- confident you know what you are doing (Similar to
- the "Group Confirm Delete" in older versions of
- Burn).
- Display Status
- This option if selected will display a dialog box
- during destruction, showing the progress of the
- destruction. Burn will quickly destroy normal
- sized files, but you might want to select this
- option if you frequently burn large documents.
- Erase Patterns
- This pop-up menu lets you select the erase pattern
- Burn should use when overwriting files. If you
- are using only a single pass select all zeros or
- all ones for quick but good security. For maximum
- security you should probably select Random (and
- multiple passes).
- Erase Passes
- This pop-up menu lets you specify the number of
- erase passes Burn should make over the file while
- destroying it. For maximum security, select at
- least three. Anything over a single pass is
- serious overkill though unless you expect your
- hard disk to be in the NSA's hands anytime soon.
- Limitations
- There are a couple of things you need to be aware
- of using this or any file destruction utility.
- The first issue concerns file names. Burn does
- its best to destroy the file name as well as the
- data, but certain system extensions can prevent
- this. Norton Utilities File Saver for instance.
- No file saver I know of can prevent Burn from
- destroying the files contents, but they might
- allow recovery of the filename. Your best bet if
- this is a concern is to try whatever undelete
- utility you have. If the utility recovers the
- file name then you know this is an issue for you.
- If not then you have no problems. (Note that even
- if an undelete utility "recovers" a file, all that
- will be in it will be whatever erase pattern you
- specified.)
- Secondly you should be concerned if you have a
- file which frequently grows and shrinks in size
- (maybe a database file for instance.) There is no
- way for an application like Burn to know that some
- disk blocks used to be allocated to the file if it
- shrinks. Use the Erase Disk Free Space to
- minimize this problem.
- Do not be unduly concerned by these limits. I
- want to make sure users are aware of them, but the
- vast majority of normal usage will never trigger
- the conditions under which these problems can
- occur.
- Burn can not destroy locked files, or files on
- locked or write protected volumes. Nor can it
- destroy files that are in use. In such cases you
- will get an appropriate error message.
- Troubleshooting
- I have no disk space free after using Burn's Erase
- Free Disk Space option, what happened?
- Something caused Burn to be prematurely
- terminated. You will find a file in the root
- directory of the disk being cleaned equal in size
- to the missing disk space. This file should be
- deleted using the normal trash can and then repeat
- the Erase Free Space operation. The file's name
- starts with the characters "MwBu" and after that
- is a long series of numbers.
- I pushed Burn into the background while erasing
- free space and I don't have any disk space
- available, what happened?
- Burn temporarily grabs all available free space on
- a volume while its erasing it. With Burn in the
- background during such an operation you can't do
- things that require additional disk space to be
- allocated. As soon as Burn completes its
- operation you will be able to create new files.
- I can't drag files or folders to the application
- for deletion, what happened?
- You need to rebuild your desktop (this is a good
- idea to do regularly anyway). Reboot your
- computer and hold down the command and option keys
- until you get a message asking if you want to
- rebuild the desktop. Click okay.
- Power Macintosh Users
- Burn is not available as a native application
- solely because it belongs to that small class of
- application that does not benefit by porting to
- the Power Macintosh architecture. Because Burn is
- 100% I/O bound its speed depends entirely on how
- fast your computer can transfer bytes to your hard
- disk, emulation overhead is not measurable. As a
- Power Macintosh owner myself I understand the
- desire for native applications and would provide
- Burn as a native application if it made any
- difference.
- User Support
- I provide full support for Burn. Don't hesitate
- to send mail with questions, bug reports or
- suggestions. I want this program to be the best
- there is, and I want you to be a satisfied user.
- Standard Disclaimer
- I am not responsible for any loss or damage due to
- any failure of this program regardless of the
- cause.
- Burn is © 1994 by Michael Watson and Paul Jensen.
- Burn is a product of Next Wave Software, Inc.
- This program is not in the public domain. Next
- Wave Software, Inc. reserves all rights to this
- program.
- You are free to distribute this program to other
- users provided this documentation is enclosed.
- The program can not be offered for sale without my
- permission. Enclosure as part of a user group
- shareware collection is allowed so long as the
- collection is sold only to recover distribution
- costs.
- Any party desiring to include this program as part
- of a shareware collection that is sold on a for
- profit basis must receive written permission from
- the author.
- Questions can be mailed to:
- Mike Watson
- 4830 Nightingale Dr. #E302
- Colorado Springs, CO 80918
- The following email addresses are the preferred
- method of communication:
- Internet: mdw@usa.net <-- best bet for
- fastest reply
- America On-Line : MikeW03
- CompuServe: 72510,3427 <-- guaranteed
- slowest response
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