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<sect2 arch="powerpc"><title>Partitioning Newer PowerMacs</title>
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<para>
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If you are installing onto a NewWorld PowerMac you must create a
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special bootstrap partition to hold the boot loader. The size of this
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partition must be 800KB and its partition type must be
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<emphasis>Apple_Bootstrap</emphasis>. If the bootstrap partition is
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not created with the <emphasis>Apple_Bootstrap</emphasis> type your
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machine cannot be made bootable from the hard disk. This partition
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can easily be created in <command>mac-fdisk</command> using the
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<userinput>b</userinput> command.
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</para><para>
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The special partition type Apple_Bootstrap is required to prevent
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MacOS from mounting and damaging the bootstrap partition, as there are
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special modifications made to it in order for OpenFirmware to boot it
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automatically.
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</para><para>
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Note that the bootstrap partition is only meant to hold 3 very small
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files: the <command>yaboot</command> binary, its configuration
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<filename>yaboot.conf</filename>, and a first stage OpenFirmware
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loader <command>ofboot.b</command>. It need not and must not be
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mounted on your file system nor have kernels or anything else copied
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to it. The <command>ybin</command> and <command>mkofboot</command>
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utilities are used to manipulate this partition.
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</para><para>
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In order for OpenFirmware to automatically boot &debian; the bootstrap
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partition should appear before other boot partitions on the disk,
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especially MacOS boot partitions. The bootstrap partition should be
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the first one you create. However, if you add a bootstrap partition
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later, you can use <command>mac-fdisk</command>'s
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<userinput>r</userinput> command to reorder the partition map so the
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bootstrap partition comes right after the map (which is always
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partition 1). It's the logical map order, not the physical address
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order, that counts.
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</para><para>
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Apple disks normally have several small driver partitions. If you
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intend to dual boot your machine with MacOSX, you should retain these
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partitions and a small HFS partition (800k is the minimum size). That
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is because MacOSX, on every boot, offers to initialize any disks which do
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not have active MacOS partitions and driver partitions.
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</para>
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</sect2>
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