239 lines
8.8 KiB
HTML
239 lines
8.8 KiB
HTML
<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<link rel="stylesheet" href="style_panel.css">
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<title>Create window</title>
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</head>
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<body>
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<font size=5>Create window</font><br><font size=1><br></font> 
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When you start MultiPar without selecting a recovery file, this window opens.
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On the window, you select source files and specify how to create new recovery files.
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<hr>
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<h3>Source files</h3>
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<dl><dt><b>
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Base directory</b> and <b>Browse</b> button
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</dt><dd> 
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This directory is the folder where source files exist.
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You may change this by clicking "Browse" button, Drag & Drop a folder, or double-click the path box.
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When you select a new folder, all files in the folder will be selected.
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</dd></dl>
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<dl><dt><b>
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Add Files</b>, <b>Remove Files</b>, or <b>Reset List</b> buttons
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</dt><dd> 
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You may add or remove source files by clicking those buttons.
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By right-clicking the file-list, popup menu will appear.
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To add files, "Drag & Drop" or "Copy & Paste" works, too.
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Every files must exist under the base directory.
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Though you can select files only in the parent folder for PAR 1.0,
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you can select files in the parent folder and sub-folders for PAR 2.0.
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</dd></dl>
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<p> 
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Selected files are listed on the file-list, and the total data size and blocks are calculated.
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PAR 1.0 supports upto 256 files, and PAR 2.0 supports upto 32768 files.
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It is recomended to use archiver (ZIP, RAR, TAR or something) for many files.
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In PAR 2.0, parent folders are treated as sub-directory in filenames.
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Only empty folders (without files in them) are shown as folder in the file-list.
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</p>
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<dl><dt><b>
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Split Files</b> and <b>Limit Size to
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</b></dt><dd> 
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In PAR 2.0, you can split source files by checking this option.
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The split size will be a multiple of block size, which is the highest size under than this limit.
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Splited files are saved in the recovery files' path.
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Including folder disables this feature.
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</dd></dl>
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<dl><dt><b>
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Append Recovery record
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</b></dt><dd> 
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In PAR 2.0, you can append recovery record to an archive file (ZIP or 7z format).
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This feature will join created PAR2 files at the end of a single source file.
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While recovery record is attached, general archivers can treat the archive ordinary.
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When you open the archive with recovery record by MultiPar, complete archive file is shown as "Appended".
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Caution, if you repair it, attached recovery record will be removed.
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</dd></dl>
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<hr>
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<h3>Block allocation</h3>
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<p> 
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For PAR 1.0, number of source blocks is same as number of source files (except empty file).
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If their size are different each other, it will become inefficient.
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When you treat such files of varied size, you should pack them into an archive,
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and split it into pieces of same size, then create PAR1 files for the pieces.
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</p>
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<p> 
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For PAR 2.0, many blocks are aligned in each source file.
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After source files are selected,
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ideal blocks are allocated automatically by your <a href="option2.htm#block_allocation">selected allocating method</a>.
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You may change block size or number of blocks manually.
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As you set more blocks, the speed will be slow down.
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As you set fewer blocks, it will be inefficient to recover small damage.
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For practical use, number of blocks would better be thousand or several thousands.
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When you input block size directly,
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you may type the size with unit like "KB" or "MB".
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For compatibility, it's good to set less than 100,000,000 bytes (95 MB).
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</p>
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<hr>
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<h3>Recovery files</h3>
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<dl><dt><b>
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Base Filename
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</b></dt><dd> 
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"Base Filename" is a base of naming recovery files.
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Though this will be set automatically, you may change it to favorite name.
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After the base, volume number and extension are appended.
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</dd></dl>
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<dl><dt><b>
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Path</b> and <b>Browse</b> button
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</dt><dd> 
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This is path of the directory where recovery files will be saved.
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When you change "Base directory", this is set to the location.
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You may change this by clicking "Browse" button, Drag & Drop a folder, or double-click the path box.
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</dd></dl>
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<dl><dt><b>
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Comment</b> button
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</dt><dd> 
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If you want to write personal note, you may enter comment.
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But, other PAR clients ignore this comment.
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</dd></dl>
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<dl><dt><b>
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Redundancy
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</b></dt><dd> 
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"Redundancy" is a rate of how much damage can be recovered.
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For example, if you set 10% for source files of 500MB,
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you will be able to recover damage or lost upto 50MB.
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<b>Caution</b>, actual possibility of recovery depends on the distribution of damage.
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In general, while dense damage in narrow area may be recovered with small redundancy,
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sparse damage over wide area requires larger redundancy.
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When you set 0%, only an index file to verify will be created.
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</dd></dl>
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<dl><dt><b>
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Number of Recovery blocks
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</b></dt><dd> 
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You may input the number of recovery blocks directly.
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You can set more blocks than the range of redundancy slider.
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</dd></dl>
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<dl><dt><b>
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Fit to free space</b> button and <b>Media size
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</b></dt><dd> 
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When you want to fill CD or DVD with both source files and recovery files, this feature is useful.
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You may select the media or input the writable size directly.
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It is safe to set a bit smaller redundancy,
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because the calculation considers total data size only.
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</dd></dl>
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<dl><dt><b>
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Sizing scheme</b> and <b>Number of recovery files
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</b></dt><dd> 
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"Sizing scheme" is how are the size of recovery files.
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When "<b>All the same size</b>" or "<b>Variable size</b>" is selected,
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you can set the number of recovery files.
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Then, the specified number of recovery files of same size or different size will be created.
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When "<b>Powers of 2 sizing scheme</b>" or "<b>Decimal weights sizing scheme</b>" is selected,
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the number of recovery blocks in each recovery file will be
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"1, 2, 4, 8, 16, 32, 64, 128..." or "1, 1, 2, 5, 10, 10, 20, 50...".
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Each recovery file will be smaller than the largest source file (or splited source files).
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</dd></dl>
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<p> 
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Sample distribution of 500 blocks for each sizing scheme:<br>
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<center><table border=1 cellspacing=0 cellpadding=2 width="98%">
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<tr bgcolor="E0F0E0"><th>Sizing scheme<th colspan=2>How many blocks in each recovery file
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<tr><td>All the same size<td>167, 167, 166 (when 3 files)<td>84, 84, 83, 83, 83, 83 (when 6 files)
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<tr><td>Variable size<td>72, 144, 284 (when 3 files)<td>8, 16, 32, 64, 128, 252 (when 6 files)
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<tr><td>Powers of 2 sizing scheme<td colspan=2>1, 2, 4, 8, 16, 32, 64, 128, 245 (total 9 files)
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<tr><td>Decimal weights sizing scheme<td colspan=2>1, 1, 2, 5, 10, 10, 20, 50, 100, 100, 200, 1 (total 12 files)
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</table></center>
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</p>
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<dl><dt><b>
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Efficiency
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</b></dt><dd> 
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This is a rate of how much data the recovery files can recover.
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For example, when the efficiency is 95% for recovery files of 200MB,
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you will be able to recover upto 190MB.
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</dd></dl>
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<dl><dt><b>
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Number of files that can be fully reconstructed if missing (Min - Max)
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</b></dt><dd> 
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You may refer these values to know the recoverying capability of recovery files.
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When sizes of source files are largely different, recovering a file may require more redundancy than you thought.
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</dd></dl>
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<hr>
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<dl><dt><b>
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Open</b> button
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</dt><dd> 
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If you want to open an existing recovery file, push this to select which.
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The current setting over Create window is not saved.
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</dd></dl>
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<dl><dt><b>
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Exit</b> button
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</dt><dd> 
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You can close MultiPar by pushing this.
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Be careful, because there is no warning before exit.
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The current setting over Create window is not saved.
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</dd></dl>
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<dl><dt><b>
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Options</b> button
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</dt><dd> 
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If you want to change settings, push this, then <a href="option.htm">Option window</a> will appear.
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</dd></dl>
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<dl><dt><b>
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About</b> button
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</dt><dd> 
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By pushing this, you can see version number on About window.
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You may launch this Help from there.
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</dd></dl>
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<dl><dt><b>
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Preview</b> button
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</dt><dd> 
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If you want to know the size of each recovery file,
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you can see <a href="preview.htm">Preview window</a> by pushing this.
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</dd></dl>
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<dl><dt><b>
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Create</b> button
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</dt><dd> 
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After you selected source files and done every setting,
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you push this to create recovery files.
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<a href="creating.htm">Creating window</a> will open to show the progress.
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When multiple instances of MultiPar are running,
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it waits finish of another instance's task, and will start next.
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</dd></dl>
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<div id="left_area">
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<p><a href="index.htm">Help for MultiPar</a></p>
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<a href="create.htm">Create window</a><br>
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<a href="preview.htm">Preview window</a><br>
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<a href="creating.htm">Creating window</a><br>
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<a href="verify.htm">Verify window</a><br>
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<a href="recreate.htm">Recreate window</a><br>
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<a href="option.htm">Option window</a>
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</div>
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</body>
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</html>
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