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Arcboot is the bootloader used on SGI IP22 machines like the Indy and Indigo2
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to boot Linux from an Ext{2,3}-filesystem.
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To install arcboot type:
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"/usr/sbin/arcboot <name_of_disk>" as root.
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where <name_of_disk> is the disk on which arcboot will be installed. To let
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this work the disk *must* have an SGI disklabel. Afterwards copy arcboot.conf
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into /etc/ and adjust it to your needs.
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Arcboot parses the PROM variable OSLoadPartition to find arcboot.conf therefore
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/etc/ has to be on the same partition as the kernel.
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It boots the label given in OSLoadFilename or on the command line (see below).
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If it can't fine the label in arcboot.conf it tries to boot the file
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OSLoadPartition/OSLoadFilename, allowing you to boot any file on an ext2
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filesystem by adjusting OSLoadPartition accordingly (this might be helpful if
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your freshly installed kernel doesn't boot).
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Besides the append="..." line in /etc/arcboot.conf arcboot also appends the
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value of the prom variable OSLoadOptions to the kernel's command line. This
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allows you to override the arcboot.conf's kernel command line.
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If you enter the prom and boot via the "boot" command you can pass additional
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parameters to the kernel. E.g.:
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boot linux single console=ttyS0 root=/dev/sda2
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will boot the label "linux" from arcboot.conf and append to additional
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arguments given above. Or
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boot /boot/vmlinux single console=ttyS0 root=/dev/sda2
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will boot the file with the absolute path OSLoadPartition/boot/vmlinux with the
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same arguments as above. Note that OSLoadPartition must be an partition name
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as understood by ARCS (like scsi(0)disk(1)rdisk(0)partition(0)).
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Note: arcboot can only load ELF kernels. ECOFF is (and will not be) supported.
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For tftpbooting please refer to the tip22 package.
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- arcboot is based on the arc-bootloader for SGI visual workstations written
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- the e2fslib dir is basically a stripped down verion of e2fsprogs 1.25 as
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found on http://sourceforge.net/projects/e2fsprogs and written by Theodore
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Tso <tytso@thunk.org> compiled with -nopic.
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- most of the config file parsing is borrowed from delo by Florian Lohoff
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<flo@rfc822.org>. Additional thanks to him for a weekend of input,testing &
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-- Guido Guenther <agx@sigxcpu.org>, Sun, 26 Apr 2003 20:29:43 +0100
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