C.5. Debian Partitioning Programs

Several varieties of partitioning programs have been adapted by Debian developers to work on various types of hard disks and computer architectures. Following is a list of the program(s) applicable for your architecture.

partman

Recommended partitioning tool in Debian. This Swiss army knife can also resize partitions, create filesystems and assign them to the mountpoints.

cfdisk

A simple-to-use, full-screen disk partitioner for the rest of us.

Note that cfdisk doesn't understand FreeBSD partitions at all, and, again, device names may differ as a result.

mac-fdisk

Mac-aware version of fdisk.

One of these programs will be run by default when you select Partition disks (or similar). It may be possible to use a different partitioning tool from the command line on VT2, but this is not recommended.

One key point when partitioning for Mac type disks is that the swap partition is identified by its name; it must be named swap. All Mac linux partitions are the same partition type, Apple_UNIX_SRV2. Please read the fine manual. We also suggest reading the mac-fdisk Tutorial, which includes steps you should take if you are sharing your disk with MacOS.

C.5.1. Partitioning Newer PowerMacs

If you are installing onto a NewWorld PowerMac you must create a special bootstrap partition to hold the boot loader. The size of this partition must have at least 819200 bytes and its partition type must be Apple_Bootstrap. If the bootstrap partition is not created with the Apple_Bootstrap type your machine cannot be made bootable from the hard disk. This partition can easily be created by creating a new partition in partman and telling it to use it as a NewWorld boot partition, or in mac-fdisk using the b command.

The special partition type Apple_Bootstrap is required to prevent MacOS from mounting and damaging the bootstrap partition, as there are special modifications made to it in order for OpenFirmware to boot it automatically.

Note that the bootstrap partition is only meant to hold 3 very small files: the yaboot binary, its configuration yaboot.conf, and a first stage OpenFirmware loader ofboot.b. It need not and must not be mounted on your file system nor have kernels or anything else copied to it. The ybin and mkofboot utilities are used to manipulate this partition.

In order for OpenFirmware to automatically boot Debian GNU/Linux the bootstrap partition should appear before other boot partitions on the disk, especially MacOS boot partitions. The bootstrap partition should be the first one you create. However, if you add a bootstrap partition later, you can use mac-fdisk's r command to reorder the partition map so the bootstrap partition comes right after the map (which is always partition 1). It's the logical map order, not the physical address order, that counts.

Apple disks normally have several small driver partitions. If you intend to dual boot your machine with MacOSX, you should retain these partitions and a small HFS partition (800k is the minimum size). That is because MacOSX, on every boot, offers to initialize any disks which do not have active MacOS partitions and driver partitions.