Subject: installation-reports: Booting from USB stick not restricted to FAT Package: installation-reports Severity: minor Tags: patch
*** Please type your report below this line *** Documentation: http://d-i.alioth.debian.org/manual/en.i386/ch04s03.html etc. Section 4.3: Preparing Files for USB Memory Stick Booting. This section is out of date in that it suggests that it is necessary to create a FAT16 partition on the USB stick in order to boot. This is a serious inconvenience and is no longer true since syslinux now supports ext2 in the shape of "extlinux": http://syslinux.zytor.com/wiki/index.php/EXTLINUX Until grub2 is working reliably, syslinux/extlinux seems to be the only sensible way to boot on machines with only usb ports. So requiring a (probably temporary) fat partition on a usb stick is a major inconvenience, especially since large sticks on which it is possible to include several dvd iso images are now widely and cheaply available. Thus Section 4.3.2.1. "Partitioning the USB stick" needs rewriting. Perhaps it should start along the following lines: We will show how to set up the memory stick to use either an ext2 or a fat partition. Most usb sticks come pre-configured with a single fat32 or fat16 partition, often with a MBR (Master Boot Record) already set up in the first sector of the underlying device. If you want to keep the fat partition, perhaps so that the stick can be used on both linux and other operating systems, then you can use syslinux as described below. Otherwise, you might want at least one ext2 partition for the extra facilities it offers. In that case, you will use the syslinux variant called extlinux. (http://syslinux.zytor.com/wiki/index.php/EXTLINUX) If you decide to change the partitions on the usb stick, you can use fdisk, cfdisk, or sfdisk among others including tools that run on other operating systems. Just ensure you include at least one fat or at least one ext2 partition to hold the vmlinuz and initrd.gz installer files. If you have a new partition, next a filesystem of the right sort needs to be created. For a fat partition, use mkdosfs; for ext2, use mke2fs. If the partition is /dev/sdXn, then either # mkdosfs /dev/sdXn or # mke2fs /dev/sdXn In order to start the installer kernel after booting from the usb stick, we will put a boot loader on the stick. Although any boot loader (apart from grub which currently has problems with usb sticks) should work, it's convenient to use syslinux package, since it can use either fat or ext2 and can be reconfigured by just editing a text file. If you choose fat, most operating systems can be used to make changes to the configuration of the boot loader. Install the syslinux package (which includes extlinux) and, if you are using fat, also the mtools package. To install the boot loader, for fat, # syslinux /dev/sdXn Again, take care that you use the correct device name. For ext2, you mount the target filesystem first: # mount -t ext2 /dev/sdXn /mountpoint "mountpoint" above is an (normally empty) directory which you can create with the mkdir command if there is no existing mount point available. Then # extlinux /mountpoint We now have boot sector in the partition and either linux.sys or extlinux.sys which contain the boot loader code in the root of the target directory: both syslinux and extlinux can place them elsewhere, but we only cover the simplest case here. ======================================================= 4.3.2.2. Adding the installer image The sentence: "Next you should create a syslinux.cfg configuration file, which at a bare minimum should contain the following two lines:" should become Next you should create a configuration file: either syslinux.cfg (fat) or extlinux.conf (ext2). At a bare minimum, it should contain the following two lines: ================================================================ A E Lawrence -- System Information: Debian Release: 4.0 APT prefers stable APT policy: (990, 'stable'), (500, 'proposed-updates') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.27.10 Locale: LANG=en_GB, LC_CTYPE=en_GB (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
