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1、硬件要求：8G或以上的u盘，服务器支持从u盘启动。

2、原理及难点：

• centos6.2的dvd文件非常大，超过4G，fat32文件系统不支持4G以上文件；而用于引导linux的文件系统恰恰就是fat32格式。
• 将u盘分成两个区，一个用于启动linux，为fat32文件系统；一个用于存放安装文件，为ext2文件系统。
• 这一制作过程需要在linux环境下制作。没有linux环境的朋友只有先用虚拟机安装一个linux系统。这一过程会碰到的问题主要有：guest上网、安装vmware tool、host和guest文件共享、guest访问host中的u盘。还有在制作过程中可能会碰到某些命令找不到，这需要用yum安装一些包。如：mkfs.vfat目录需要yum install dosfstools，还有syslinux等。

Of the various applications for creating bootable Windows or Linux drives, RMPrepUSB offers some unique features which may be appealing to many users. Advanced users can set specific parameters for the drive if necessary. New and inexperienced users can easily use this application as well. Unlike other similar applications RMPrepUSB has additional features that stand out. There are options for USB formatting in several file systems such as FAT16, FAT32 and NTFS formats. You are able to run a USB speed test, size/speed test, install Grub4dos, SYSLINUX, and even create AXT2 FS on any USB drive. This is much more convenient than creating bootable disks on CD or DVD, as pen drives are much easier to keep track of and less prone to damage.

This application is completely free with no catch and you don’t end up with a dozen different toolbars in your browsers or applications that you don’t want. The download is free of advertizing and so is the installation. You get a quick download in a .zip file and then simply double-click the .exe file to start the installation. This application does not open automatically after installation, but does offer a desktop icon for easy access. You can download RMPrepUSB from this link: http://www.rmprepusb.tk/

Windows7安装方式

一、微软的USB安装软件

微软官方的工具：http://images2.store.microsoft.com/prod/clustera/framework/w7udt/1.0/en-us/Windows7-USB-DVD-tool.exe

过去想将Windows7光盘ISO文件转为USB优盘启动要手工操作很多步骤，对新手来说有一定的难度。最近微软发布了一款傻瓜型的自动转换工具 Windows7 USB/DVD Download Tool 则大大方便了这种操作过程。你只需运行它，选择下载好的Windows7的ISO文件，并选择制作USB闪盘或制作DVD光盘，程序便会自动为你制作好可启动的Win7安装U盘或刻录成DVD光盘了。