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<div class=Section1>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:16.0pt;font-family:"Comic Sans MS"'>RKFS -A new <span
class=SpellE>filesystem</span> for Linux Operating System<o:p></o:p></span></p>
<p class=MsoNormal align=center style='text-align:center'><span class=GramE><span
style='font-size:11.0pt;font-family:"Comic Sans MS"'>from</span></span><span
style='font-size:11.0pt;font-family:"Comic Sans MS"'> <a
href="http://rkfs.sourceforge.net/rajark.jpg">R.K.Raja</a> (rajkanna_hcl@yahoo.com)<o:p></o:p></span></p>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:11.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>RKFS</b> is the
acronym for 'RK <span class=SpellE>Filesystem</span>'. It is a file system that
has been designed and implemented from the scratch for small devices (the
devices with less capacity). The main goal is to provide a simple but yet
powerful file system that provides all the features as <span class=SpellE>MinixFS</span>
and Ext2FS but for small devices. It is the only file system that has been
designed and implemented, keeping the characteristics of small devices in mind.
It shares many properties with the traditional UNIX file systems. It has the
concept of blocks, <span class=SpellE>inodes</span> and directories. It is
highly robust and provides excellent performance as Ext2 & <span
class=SpellE>Minix</span> file systems. </p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>RKFS is known to work on 2.4.x <span class=SpellE>linux</span>
kernels.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>A feature wise comparison of RKFS, <span class=SpellE>MinixFS</span>
& Ext2FS is given below. This clearly shows one what RKFS is for.<br>
</p>
<p class=MsoNormal><span class=SpellE><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Filesystem</span></b></span><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt'> creation benchmarks<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span class=SpellE><b>Filesystem</b></span><b> creation</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>Simple
& Fastest</span></b><span style='color:blue'><o:p></o:p></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span class=SpellE>Simpe</span> & less faster than RKFS</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span class=SpellE>Simpe</span> & less faster than RKFS</p>
</td>
</tr>
<tr style='mso-yfti-irow:2;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>The benchmark was done on a 1.4 MB floppy disk</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>1 <span
class=SpellE>secs</span></span></b><b style='mso-bidi-font-weight:normal'><span
style='color:blue'><o:p></o:p></span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>2 <span class=SpellE>secs</span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>5 <span class=SpellE>secs</span></p>
</td>
</tr>
</table>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Total metadata blocks used internally<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Total metadata blocks used/reserved on a newly created
FS on a device with 1440 blocks</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>3
blocks</span></b><b style='mso-bidi-font-weight:normal'><span
style='color:blue'> <o:p></o:p></span></b></p>
<p><b><span style='color:blue;mso-bidi-font-style:italic'>( 1 block for boot
sector,</span></b><b style='mso-bidi-font-weight:normal'><span
style='color:blue'> <br>
<span style='mso-bidi-font-weight:bold;mso-bidi-font-style:italic'>1 block
for <span class=SpellE>superblock</span>,</span> <br>
<span style='mso-bidi-font-weight:bold;mso-bidi-font-style:italic'>1 block
for <span class=SpellE>inode</span> table for root <span class=SpellE>inode</span>
)</span></span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>19 blocks</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>28 blocks </p>
<p>( 1 block for boot sector, <br>
1 block for <span class=SpellE>superblock</span>, <br>
1 block for group descriptor, <br>
1 block for block bitmap block, <br>
1 block for <span class=SpellE>inode</span> bitmap block, <br>
23 blocks for <span class=SpellE>inode</span> table )</p>
</td>
</tr>
</table>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Total free blocks available on a newly created FS<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Total free blocks (available to user to store data on a
newly created FS on device with 1440 blocks )</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>1436</span></b><b
style='mso-bidi-font-weight:normal'><span style='color:blue'><o:p></o:p></span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>1420</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>1399</p>
</td>
</tr>
</table>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Total free <span class=SpellE>inodes</span> available
on a newly created FS<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Total free <span class=SpellE>inodes</span> ( available
to the user on a newly created FS on a device with 1440 blocks )</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>1436</span></b><b
style='mso-bidi-font-weight:normal'><span style='color:blue'> <o:p></o:p></span></b></p>
<p><span class=GramE><b><span style='color:blue;mso-bidi-font-style:italic'>(
This</span></b></span><b><span style='color:blue;mso-bidi-font-style:italic'>
means user could create 1436 empty files! )</span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>479 </p>
<p><span class=GramE>( This</span> means user could create only 479 files,
even if the files are empty! )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>173 </p>
<p><span class=GramE>( This</span> means user could create only 173 files,
even if they are just 0 bytes file!! )</p>
</td>
</tr>
</table>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><span class=SpellE><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Inode</span></b></span><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt'> block allocation strategy<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span class=SpellE><b>Inode</b></span><b> block allocation
strategy</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>Dynamic
( <span class=SpellE>Inode</span> blocks are allocated on demand )</span></b><span
style='color:blue'><o:p></o:p></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Fixed allocation ( <span class=SpellE>Inode</span> blocks
are allocated at the time of <span class=SpellE>filesystem</span> <br>
creation )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Fixed allocation ( <span class=SpellE>Inode</span> blocks
are allocated at the time of <span class=SpellE>filesystem</span> creation )</p>
</td>
</tr>
</table>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><span class=SpellE><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Inode</span></b></span><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt'> block de-allocation strategy<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span class=SpellE><b>Inode</b></span><b> block
de-allocation strategy</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>Dynamic </span></b><span
style='color:blue'> <o:p></o:p></span></p>
<p><b><span style='color:blue;mso-bidi-font-style:italic'>( This means when
all the <span class=SpellE>inode</span> in an <span class=SpellE>inode</span>
block are freed, then that <span class=SpellE>inode</span> blocks will also
be freed )</span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>No de-allocation strategy </p>
<p><span class=GramE>( This</span> means that once the <span class=SpellE>inode</span>
blocks are allocated during <span class=SpellE>filesystem</span> creation,
they cannot be freed for ever! )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>No de-allocation strategy </p>
<p><span class=GramE>( This</span> means that once the <span class=SpellE>inode</span>
blocks are allocated during <span class=SpellE>filesystem</span> creation,
they cannot be freed for ever! )</p>
</td>
</tr>
</table>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Comparison of other standard features<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="100%"
style='width:100.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Feature</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>RKFS</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span class=SpellE><b>MinixFS</b></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><b>Ext2FS</b></p>
</td>
</tr>
<tr style='mso-yfti-irow:1'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Support for all standard <span class=SpellE>unix</span>
file types (like directories, regular files, device files, hard & soft
links )</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:2'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Max FS size</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>65 MB</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>65 MB</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>2 TB</p>
</td>
</tr>
<tr style='mso-yfti-irow:3'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Max file size</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>65 MB</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>65 MB</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>2 GB</p>
</td>
</tr>
<tr style='mso-yfti-irow:4'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Max filename length</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>252 characters</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>30 characters</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>255 characters</p>
</td>
</tr>
<tr style='mso-yfti-irow:5'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Total direct data blocks in <span class=SpellE>inode</span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b><span style='color:blue;mso-bidi-font-style:italic'>39</span></b><span
style='color:blue'> <o:p></o:p></span></p>
<p><b><span style='color:blue;mso-bidi-font-style:italic'>( This means a file
of size 39K would be accessed more faster than a file with sizes
greater than 39K )</span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>7</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>12</p>
</td>
</tr>
<tr style='mso-yfti-irow:6'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Blocks reserved for <span class=SpellE>superuser</span></b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES ( default 5 % )</p>
</td>
</tr>
<tr style='mso-yfti-irow:7'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>User land program (<span class=SpellE>mkfs</span>)</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:8'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>User land program (<span class=SpellE>dumpfs</span>)</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:9'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>User land program (<span class=SpellE>debugfs</span>)</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO ( Not really required )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:10'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>User land program (<span class=SpellE>fsck</span>)</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO (Under construction )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:11'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Access / Change / Delete time support</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO <span class=GramE>( all</span> the three are same! )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:12'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Variable <span class=SpellE>blocksize</span> support</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO ( Not really required for small devices )</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>NO</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
<tr style='mso-yfti-irow:13'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Block sync read/write performance</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Same as <span class=SpellE>MinixFS</span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Better</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>A bit advanced ( because of <span class=SpellE>clusterred</span>
block allocation strategy )</p>
</td>
</tr>
<tr style='mso-yfti-irow:14'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Block <span class=SpellE>async</span> read/write performance</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Same as <span class=SpellE>MinixFS</span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Better</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>A bit advanced ( because of the <span class=SpellE>clusterred</span>
block allocation strategy )</p>
</td>
</tr>
<tr style='mso-yfti-irow:15;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><b>Extensible</b></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>YES</p>
</td>
</tr>
</table>
<p class=MsoNormal><br>
</p>
<p class=MsoNormal><span class=SpellE><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt'>Filesystem</span></b></span><b style='mso-bidi-font-weight:
normal'><span style='font-size:14.0pt'> layout comparison<o:p></o:p></span></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>Ext2FS Layout<o:p></o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="30%"
style='width:30.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Boot Sector</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Block Group1</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Block Group2</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>.....</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Block <span class=SpellE>GroupN</span></p>
</td>
</tr>
</table>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Number of blocks in each group = 8192 <br>
<o:p></o:p></p>
<table class=MsoNormalTable border=1 cellpadding=0 width="30%"
style='width:30.0%;mso-cellspacing:1.5pt'>
<tr style='mso-yfti-irow:0;mso-yfti-lastrow:yes'>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Super Block</p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal>Group Descriptors</p>