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Installing Debian GNU/Linux 2.2 For PowerPC
Chapter 2 - System Requirements

This section contains information about what hardware you need to get started with Debian. You will also find links to further information about hardware supported by GNU and Linux.

2.1 Supported Hardware

Debian does not impose hardware requirements beyond the requirements of the Linux kernel and the GNU tool-sets. Therefore, any architecture or platform to which the Linux kernel, libc, gcc, etc. have been ported, and for which a Debian port exists, can run Debian.

There are, however, some limitations in our boot floppy set with respect to supported hardware. Some Linux-supported platforms might not be directly supported by our boot floppies. If this is the case, you may have to create a custom rescue disk (see Replacing the Rescue Floppy Kernel, Section 9.3), or investigate network installations.

Rather than attempting to describe all the different hardware configurations which are supported for PowerPC, this section contains general information and pointers to where additional information can be found.

2.1.1 Supported Architectures

Debian 2.2 supports six architectures: Intel x86-based architectures; Motorola 680x0 machines such as Atari, Amiga, and Macintoshes; DEC Alpha machines; Sun SPARC machines; ARM and StrongARM machines; and some IBM/Motorola PowerPC machines, including CHRP, PowerMac and PReP machines. These are referred to as i386, m68k, alpha, sparc, arm, and powerpc, respectively.

This document covers installation for the powerpc architecture. If you look for information on other architectures take a look at the Debian-Ports pages.

This is the first official release of Debian GNU/Linux for the PowerPC architecture. We feel that it has proven itself sufficiently to be released. However, because it has not had the exposure (and hence testing by users) that some other architectures have had, you may encounter a few bugs. Use our Bug Tracking System to report any problems; make sure to mention the fact that the bug is on the PowerPC platform. It can be necessary to use the debian-powerpc mailing list as well.

2.1.2 CPU, Mainboards, and Video Support

There are three major supported powerpc flavors: CHRP, PMac (Power-Macintosh) and PReP machines. Ports to other powerpc architectures, such as the Apus, Be-Box and MBX architecture, are underway but not yet supported by Debian. Possible we will have also a 64bit port (Power3) in the future.

2.1.3 Multiple Processors

Multi-processor support -- also called ``symmetric multi-processing'' or SMP -- is supported for this architecture. However, the standard Debian 2.2 kernel image does not support SMP. This should not prevent installation, since the standard, non-SMP kernel should boot on SMP systems; the kernel will simply use the first CPU.

In order to take advantage of multiple processors, you'll have to replace the standard Debian kernel. You can find a discussion of how to do this in Compiling a New Kernel, Section 8.4. At this time (kernel version 2.2.19) the way you enable SMP is to select ``symmetric multi-processing'' in the ``General'' section of the kernel config. If you compile software on a multiprocessor system, look for the -j flag in the documentation on make(1).

2.2 Installation Media

There are four different media which can be used to install Debian: floppies, CD-ROMs, local disk partitions, or the network. Different parts of the same Debian installation can mix and match these options; we'll go into that in Methods for Installing Debian, Chapter 5.

Floppy disk installation is a common option, although generally, the least desirable. In many cases, you'll have to do your first boot from floppies, using the Rescue Floppy. Generally, all you will need is a high-density (1440 kilobytes) 3.5 inch floppy drive. For CHRP floppy support is currently broken.

CD-ROM based installation is also supported for some architectures. On machines which support bootable CD-ROMs, you should be able to do a completely floppy-less installation. Even if your system doesn't support booting from a CD-ROM, you can use the CD-ROM in conjunction with the other techniques to install your system, once you've booted up by other means; see Booting and/or Installing from a CD-ROM, Section 6.4.

Installation from local disk is another option. If you have free space on partitions other than the partitions you're installing to, this is definitely a good option. Some platforms even have local installers, i.e., for booting from AmigaOS, TOS, or MacOS.

The last option is network installation. You can install your base system via HTTP or NFS. You can also boot your system over the network. Diskless installation, using network booting and NFS-mounting of all local filesystems, is another option -- you'll probably need at least 16MB of RAM for this option. After your base system is installed, you can install the rest of your system via any sort of network connection (including PPP), via FTP, HTTP, or NFS.

More complete descriptions of these methods, and helpful hints for picking which method is best for you, can be found in Methods for Installing Debian, Chapter 5. Please be sure to continue reading to make sure the device you intend to boot and install from is supported by the Debian installation system.

2.2.1 Supported Storage Systems

The Debian boot disks contain a kernel which is built to maximize the number of systems it runs on. Unfortunately, this makes for a larger kernel, with a lot of drivers which will never be used (see Compiling a New Kernel, Section 8.4 to learn how to build your own). However, support for the widest possible range of devices is desirable in order to ensure that Debian can be installed on the widest array of hardware.

Any storage system supported by the Linux kernel is also supported by the boot system. Note that the current Linux kernel does not support floppies on CHRP systems at all.

2.3 Memory and Disk Space Requirements

You must have at least 5MB of memory and 64MB of hard disk. If you want to install a reasonable amount of software, including the X Window System, and some development programs and libraries, you'll need at least 300MB. For a more or less complete installation, you'll need around 800MB. To install everything available in Debian, you'll probably need around 2 GB. Actually, installing everything doesn't even make sense, since some packages conflict with others.

2.4 Peripherals and Other Hardware

Linux supports a large variety of hardware devices such as mice, printers, scanners, modems, network cards, PCMCIA devices, etc. However, none of these devices are required while installing the system. This section contains information about peripherals specifically not supported by the installation system, even though they may be supported by Linux.

Any network interface card (NIC) supported by the Linux kernel should also be supported by the boot disks. You may need to load your network driver as a module.

2.5 Purchasing Hardware Specifically for GNU/Linux

There are several vendors, now, who ship systems with Debian or other distributions of GNU/Linux pre-installed. You might pay more for the privilege, but it does buy a level of peace of mind, since you can be sure that the hardware is well-supported by GNU/Linux.

Whether or not you are purchasing a system with Linux bundled, or even a used system, it is still important to check that your hardware is supported by the Linux kernel. Check if your hardware is listed in the references found above. Let your salesperson (if any) know that you're shopping for a Linux system. Support Linux-friendly hardware vendors.

2.5.1 Avoid Proprietary or Closed Hardware

Some hardware manufacturers simply won't tell us how to write drivers for their hardware. Others won't allow us access to the documentation without a non-disclosure agreement that would prevent us from releasing the Linux source code. One example is the IBM laptop DSP sound system used in recent ThinkPad systems -- some of these systems also couple the sound system to the modem. Another example is the proprietary hardware in the older Macintosh line.

Since we haven't been granted access to the documentation on these devices, they simply won't work under Linux. You can help by asking the manufacturers of such hardware to release the documentation. If enough people ask, they will realize that the free software community is an important market.

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Installing Debian GNU/Linux 2.2 For PowerPC

version 2.2.27, 14 October, 2001
Bruce Perens
Sven Rudolph
Igor Grobman
James Treacy
Adam Di Carlo