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<p><FONT class=normalfont><B><font color=blue>双启动型USB优盘的使用举例和注意问题</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br> 双启动型USB优盘的使用举例和注意问题(2002-11-07 14:50:37) By tony<br>
现在市面上有一种双启动型的USB优盘（它可作为硬盘使用也可以作为软盘使用）<br>
但在LINUX上使用时，不少网友反映了不少问题，特别是以软盘使用时的问题最多，<br>
现在以‘朗科64M双启动型USB优盘’作为例子，<br>
<br>
一、硬盘方式<br>
>>> fdisk -l /dev/sd? <br>
Disk /dev/sda: 3 heads, 42 sectors, 1008 cylinders <br>
Units = cylinders of 126 * 512 bytes <br>
<br>
Device Boot Start End Blocks Id System <br>
/dev/sda1 * 1 1008 63472+ 6 FAT16 <br>
Partition 1 has different physical/logical beginnings (non-Linux?): <br>
phys=(0, 1, 1) logical=(0, 1, 22) <br>
Partition 1 has different physical/logical endings: <br>
phys=(154, 13, 63) logical=(1007, 2, 42) <br>
Partition 1 does not end on cylinder boundary: <br>
phys=(154, 13, 63) should be (154, 2, 42) <br>
<br>
加载上面的分区<br>
<br>
mount -t vfat /dev/sda1 /mnt/mnt <br>
(这里的 /dev/sda1 是一个分区) <br>
<br>
那么现在就可以使用USB盘了<br>
<br>
二、软盘方式<br>
>>> fdisk -l /dev/sd? <br>
Disk /dev/sda: 1 heads, 3 sectors, 960 cylinders <br>
Units = cylinders of 3 * 512 bytes <br>
<br>
Device Boot Start End Blocks Id System <br>
/dev/sda1 ? 1820786 1820786 0 45 Unknown <br>
Partition 1 has different physical/logical beginnings (non-Linux?): <br>
phys=(334, 69, 18) logical=(1820785, 0, 1) <br>
Partition 1 has different physical/logical endings: <br>
phys=(32, 76, 32) logical=(1820784, 0, 3) <br>
Partition 1 does not end on cylinder boundary: <br>
phys=(32, 76, 32) should be (32, 0, 3) <br>
<br>
在这里请注意，上面显示在USB软盘上在一个分区，但实际上这个分区是无法加载的，<br>
请看上面的 Blocks 为 0 ，也就分区是没有空间的，<br>
那么要怎么样才能加载这个USB软盘呢？<br>
<br>
我们把分区的概念去掉，也就是不要想分区的问题，想一想我平时是怎么用一般软盘的<br>
mount -t vfat /dev/fd0 /mnt/fd <br>
那么道理在USB软盘上差不多<br>
mount -t vfat /dev/sda /mnt/usbfd <br>
(这里的 /dev/sda 不是分区) <br>
这样执行能行，成功加载<br>
cd /mnt/usbfd <br>
ls <br>
<br>
这时你会看到DOS的启动文件,请注意这时的USB软盘只有1M的空间可以用<br>
<br>
总结：<br>
<br>
从上面的例子看到，在LINUX中使用USB优盘有一定的技巧，本例子中的‘软盘方式’<br>
所使用的办法同样可以用在某些‘单启动型USB优盘’，因为这些‘单启动型USB优盘’是<br>
以软盘方式接入LINUX的。
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