162 lines
5.4 KiB
HTML
162 lines
5.4 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>Recreate window</title>
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</head>
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<body>
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<font size=5>Recreate window</font><br><font size=1><br></font> 
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When you push "Extra" button on <a href="verify.htm">Verify window</a>, this window opens.
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While Recreate window is alomst same as Create window, you cannot change source files.
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<hr>
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<h3>Source files</h3>
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<p> 
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The directory and selection of source files are same as the original recovery file.
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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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You cannot change the block allocation, too.
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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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If you don't want to over-write original files, you may change to a different name.
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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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You can enter newly, or you may change the previous 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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First recovery block number
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</b></dt><dd> 
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If you want to add extra recovery blocks to the original recovery files,
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by setting this starting number,
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you can create recovery files from the previous block.
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If this value is 0, all recovery blocks are recreated from first block.
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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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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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In the later two scheme, size of a recovery file is limited to size of the largest source file.
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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 Recreate 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 Recreate 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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</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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