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In the grub shell, specify the filefileas the actual drive for abiosdrivedrive. You can use this command to create a disk image, and/or to fix the drives guessed by GRUB when GRUB fails to determine them correctly, like this:

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grub>device (fd0) /floppy-image
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This command can be used only in the grub shell (seeInvoking the grub shell).51Testing软件测试网7_ ]W8\i$i

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GNU GRUB Manual 0.97

Table of Contents

• GNU GRUB manual
• 1 Introduction to GRUB
  • 1.1 Overview
  • 1.2 History of GRUB
  • 1.3 GRUB features
  • 1.4 The role of a boot loader
• 2 Naming convention
• 3 Installation
  • 3.1 Creating a GRUB boot floppy
  • 3.2 Installing GRUB natively
  • 3.3 Installing GRUB using grub-install
  • 3.4 Making a GRUB bootable CD-ROM
• 4 Booting
  • 4.1 How to boot operating systems
    • 4.1.1 How to boot an OS directly with GRUB
    • 4.1.2 Load another boot loader to boot unsupported operating systems
  • 4.2 Some caveats on OS-specific issues
    • 4.2.1 GNU/Hurd
    • 4.2.2 GNU/Linux
    • 4.2.3 FreeBSD
    • 4.2.4 NetBSD
    • 4.2.5 OpenBSD
    • 4.2.6 DOS/Windows
    • 4.2.7 SCO UnixWare
    • 4.2.8 QNX
  • 4.3 How to make your system robust
    • 4.3.1 Booting once-only
    • 4.3.2 Booting fallback systems
• 5 Configuration
• 6 Downloading OS images from a network
  • 6.1 How to set up your network
  • 6.2 Booting from a network
• 7 Using GRUB via a serial line
• 8 Embedding a configuration file into GRUB
• 9 Protecting your computer from cracking
• 10 GRUB image files
• 11 Filesystem syntax and semantics
  • 11.1 How to specify devices
  • 11.2 How to specify files
  • 11.3 How to specify block lists
• 12 GRUB's user interface
  • 12.1 The flexible command-line interface
  • 12.2 The simple menu interface
  • 12.3 Editing a menu entry
  • 12.4 The hidden menu interface
• 13 The list of available commands
  • 13.1 The list of commands for the menu only
    • 13.1.1 default
    • 13.1.2 fallback
    • 13.1.3 hiddenmenu
    • 13.1.4 timeout
    • 13.1.5 title
  • 13.2 The list of general commands
    • 13.2.1 bootp
    • 13.2.2 color
    • 13.2.3 device
    • 13.2.4 dhcp
    • 13.2.5 hide
    • 13.2.6 ifconfig
    • 13.2.7 pager
    • 13.2.8 partnew
    • 13.2.9 parttype
    • 13.2.10 password
    • 13.2.11 rarp
    • 13.2.12 serial
    • 13.2.13 setkey
    • 13.2.14 terminal
    • 13.2.15 terminfo
    • 13.2.16 tftpserver
    • 13.2.17 unhide
  • 13.3 The list of command-line and menu entry commands
    • 13.3.1 blocklist
    • 13.3.2 boot
    • 13.3.3 cat
    • 13.3.4 chainloader
    • 13.3.5 cmp
    • 13.3.6 configfile
    • 13.3.7 debug
    • 13.3.8 displayapm
    • 13.3.9 displaymem
    • 13.3.10 embed
    • 13.3.11 find
    • 13.3.12 fstest
    • 13.3.13 geometry
    • 13.3.14 halt
    • 13.3.15 help
    • 13.3.16 impsprobe
    • 13.3.17 initrd
    • 13.3.18 install
    • 13.3.19 ioprobe
    • 13.3.20 kernel
    • 13.3.21 lock
    • 13.3.22 makeactive
    • 13.3.23 map
    • 13.3.24 md5crypt
    • 13.3.25 module
    • 13.3.26 modulenounzip
    • 13.3.27 pause
    • 13.3.28 quit
    • 13.3.29 reboot
    • 13.3.30 read
    • 13.3.31 root
    • 13.3.32 rootnoverify
    • 13.3.33 savedefault
    • 13.3.34 setup
    • 13.3.35 testload
    • 13.3.36 testvbe
    • 13.3.37 uppermem
    • 13.3.38 vbeprobe
• 14 Error messages reported by GRUB
  • 14.1 Errors reported by the Stage 1
  • 14.2 Errors reported by the Stage 1.5
  • 14.3 Errors reported by the Stage 2
• 15 Invoking the grub shell
  • 15.1 Introduction into the grub shell
  • 15.2 How to install GRUB viagrub
  • 15.3 The map between BIOS drives and OS devices
• 16 Invoking grub-install
• 17 Invoking grub-md5-crypt
• 18 Invoking grub-terminfo
• 19 Invoking grub-set-default
• 20 Invoking mbchk
• Appendix A How to obtain and build GRUB
• Appendix B Reporting bugs
• Appendix C Where GRUB will go
• Appendix D Hacking GRUB
  • D.1 The memory map of various components
  • D.2 Embedded variables in GRUB
  • D.3 The generic interface for filesystems
  • D.4 The generic interface for built-ins
  • D.5 The bootstrap mechanism used in GRUB
  • D.6 How to probe I/O ports used by INT 13H
  • D.7 How to detect all installed RAM
  • D.8 INT 13H disk I/O interrupts
  • D.9 The structure of Master Boot Record
  • D.10 The format of partition tables
  • D.11 Where and how you should send patches
• Appendix E Copying This Manual
  • E.1 GNU Free Documentation License
    • E.1.1 ADDENDUM: How to use this License for your documents
• Index

/pq9B&{s,}i0Next:Introduction, Up:(dir)

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---

GNU GRUB manual

})^!k,m.Jt9I;s0This is the documentation of GNU GRUB, the GRand Unified Bootloader, a flexible and powerful boot loader program forpcs.51Testing软件测试网K1S9idl9Ct

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This edition documents version 0.97.

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rBPL3}y7Z7]0This manual is for GNU GRUB (version 0.97, 8 May 2005).51Testing软件测试网L|3_Q7hc onI

+|eZ3di0Copyright © 1999,2000,2001,2002,2004,2006 Free Software Foundation, Inc.

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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover Texts being “A GNU Manual,” and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled “GNU Free Documentation License.”51Testing软件测试网0q9]T vNy

(a) The FSF's Back-Cover Text is: “You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.”

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• Introduction: Capturing the spirit of GRUB
• Naming convention: Names of your drives in GRUB
• Installation: Installing GRUB on your drive
• Booting: How to boot different operating systems
• Configuration: Writing your own configuration file
• Network: Downloading OS images from a network
• Serial terminal: Using GRUB via a serial line
• Preset Menu: Embedding a configuration file into GRUB
• Security: Improving the security
• Images: GRUB image files
• Filesystem: Filesystem syntax and semantics
• Interface: The menu and the command-line
• Commands: The list of available builtin commands
• Troubleshooting: Error messages produced by GRUB
• Invoking the grub shell: How to use the grub shell
• Invoking grub-install: How to use the GRUB installer
• Invoking grub-md5-crypt: How to generate a cryptic password
• Invoking grub-terminfo: How to generate a terminfo command
• Invoking grub-set-default: How to set a default boot entry
• Invoking mbchk: How to use the Multiboot checker
• Obtaining and Building GRUB: How to obtain and build GRUB
• Reporting bugs: Where you should send a bug report
• Future: Some future plans on GRUB
• Internals: Hacking GRUB
• Copying This Manual: Copying This Manual
• Index

参考来源：
0{r8?]'S!d#x[z0http://www.gnu.org/software/grub/manual/html_node/index.html#Top
z4C` K+x(Y;Gt!h)D0http://www.ubuntulinux.org/wiki/HowToMakeAGRUBBootFloppy51Testing软件测试网Dz p;LW*S6G