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Diffstat (limited to 'da/install-methods/boot-usb-files.xml')
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diff --git a/da/install-methods/boot-usb-files.xml b/da/install-methods/boot-usb-files.xml new file mode 100644 index 000000000..52b765c3e --- /dev/null +++ b/da/install-methods/boot-usb-files.xml @@ -0,0 +1,188 @@ +<!-- retain these comments for translator revision tracking --> +<!-- original version: 22664 untranslated --> + + <sect1 condition="bootable-usb" id="boot-usb-files"> + <title>Preparing Files for USB Memory Stick Booting</title> + +<para> + +For preparing the USB stick you will need a system where GNU/Linux is +already running and where USB is supported. You should ensure that the +usb-storage kernel module is loaded (<userinput>modprobe +usb-storage</userinput>) and try to find out which SCSI device the USB +stick has been mapped to (in this example +<filename>/dev/sda</filename> is used). To write to your stick, you +will probably have to turn off its write protection switch. + +</para><para> + +Note, that the USB stick should be at least 128 MB in size (smaller +setups are possible if you follow <xref linkend="usb-copy-flexible"/>). + +</para> + + <sect2 id="usb-copy-easy"> + <title>Copying the files - the easy way</title> +<para> + +There is an all-in-one file <filename>hd-media/boot.img.gz</filename> +which contains all the installer files (including the kernel) as well +as <command>SYSLINUX</command> and its configuration file. You only +have to extract it directly to to your USB stick: + +<informalexample><screen> + +gzip -dc boot.img.gz >/dev/<replaceable>sda</replaceable> + +</screen></informalexample> + +Of course this will destroy anything already on the device, so take +care that you use the correct device name for your USB stick. + +</para><para> + +After that, mount the USB memory stick (<userinput>mount /dev/sda +/mnt</userinput>), which will now have a FAT filesystem on it, and +copy a Debian netinst or businesscard ISO image to it. Please note +that the file name must end in <filename>.iso</filename>. Unmount the +stick (<userinput>umount /mnt</userinput>) and you are done. + +</para> + </sect2> + + <sect2 id="usb-copy-flexible"> + <title>Copying the files - the flexible way</title> +<para> + +If you like more flexibility or just want to know what's going on, you +should use the following method to put the files on your stick. We +will show how to setup the memory stick to use the first partition, +instead of entire device. + +</para><note><para> + +Since most USB sticks come pre-configured with a single FAT16 +partition, you probably won't have to repartition or reformat the +stick. If you have to do that anyway, use <command>cfdisk</command> +or any other partitioning tool for creating a FAT16 partition and then +type + +<informalexample><screen> + +mkdosfs /dev/<replaceable>sda1</replaceable> + +</screen></informalexample> + +Take care that you use the correct device name for your USB stick. The +<command>mkdosfs</command> command is contained in the +<classname>dosfstools</classname> Debian package. + +</para></note><para> + +In order to start the kernel after booting from the USB stick, we will +put a boot loader on the stick. Although any boot loader +(e.g. <command>LILO</command>) should work, it's convenient to use +<command>SYSLINUX</command>, since it uses a FAT16 partition and can +be reconfigured by just editing a text file. Any operating system +which supports the FAT file system can be used to make changes to the +configuration of the boot loader. + +</para><para> + +To put <command>SYSLINUX</command> on the FAT16 partition on your USB +stick, install the <classname>syslinux</classname> and +<classname>mtools</classname> packages on your system, and type + +<informalexample><screen> + +syslinux /dev/<replaceable>sda1</replaceable> + +</screen></informalexample> + +Again, take care that you use the correct device name. The partition +must not be mounted when starting <command>SYSLINUX</command>. This +procedure writes a boot sector to the partition and creates the file +<filename>ldlinux.sys</filename> which contains the boot loader code. + +</para><para> + +Mount the parition (<userinput>mount /dev/sda1 /mnt</userinput>) and +copy the following files from the Debian archives to the stick: + +<itemizedlist> +<listitem><para> + +<filename>vmlinuz</filename> (kernel binary) + +</para></listitem> +<listitem><para> + +<filename>initrd.gz</filename> (initial ramdisk image) + +</para></listitem> +<listitem><para> + +<filename>syslinux.cfg</filename> (SYSLINUX configuration file) + +</para></listitem> +<listitem><para> + +Optional kernel modules + +</para></listitem> +</itemizedlist> + +If you want to rename the files, please note that +<command>SYSLINUX</command> can only process DOS (8.3) file names. + +</para><para> + +The <filename>syslinux.cfg</filename> configuration file should +contain the following two lines: + +<informalexample><screen> + +default vmlinuz +append initrd=initrd.gz ramdisk_size=10000 root=/dev/rd/0 init=/linuxrc devfs=mount,dall rw + +</screen></informalexample> + +Please note, that the <userinput>ramdisk_size</userinput> parameter +may need to be increased, depending on the image you are booting. + +</para><para> + +Now you should put any Debian ISO image (businesscard, netinst or even +a full one) onto your stick (if it fits). The file name of such an +image must end in <filename>.iso</filename>. + +</para><para> + +If you want to install over the network, without using an ISO image, +you will of course skip the previous step. Moreover you will have to +use the initial ramdisk from the <filename>netboot</filename> +directory instead of the one from <filename>hd-media</filename>, +because <filename>hd-media/initrd.gz</filename> does not have network +support. + +</para><para> + +When you are done, unmount the USB memory stick (<userinput>umount +/mnt</userinput>) and activate its write protection switch. + +</para><warning><para> + +If your system refuses to boot from the memory stick, the stick may +contain an invalid master boot record (MBR). To fix this, use the +<command>install-mbr</command> command from the package +<classname>mbr</classname>: + +<informalexample><screen> + +install-mbr /dev/<replaceable>sda</replaceable> + +</screen></informalexample> + +</para></warning> + </sect2> + </sect1> |