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diff --git a/index.xhtml b/index.xhtml new file mode 100644 index 00000000..f5f0e413 --- /dev/null +++ b/index.xhtml @@ -0,0 +1,83 @@ +<blockquote> +<h2 class="c6">About EtherBoot</h2> + +<p class="c7">Etherboot is a software package for creating ROM +images that can download code over an Ethernet network to be +executed on an x86 computer. Many network adapters have a socket +where a ROM chip can be installed. Etherboot is code that can be +put in such a ROM. Etherboot is normally used for for booting PCs +diskless. This is useful in various situations, for example:</p> + +<ul class="c11"> +<li>An X-terminal.</li> + +<li>Clusters of compute servers.</li> + +<li>Routers.</li> + +<li>Various kinds of remote servers, e.g. a tape drive server that +can be accessed with the RMT protocol.</li> + +<li>Machines doing tasks in environments unfriendly to disks.</li> + +<li>A user platform where remote partitions are mounted over the +network and you are willing to accept the lower speed compared to +disk.</li> + +<li>Maintaining software for a cluster of equally configured +workstations centrally.</li> +</ul> + +<p class="c7">Etherboot can boot computers faster than from a disk +because there are no delays in spinning up disks, etc. A moment's +calculation will show that even with a 10Mbit Ethernet, sending a +500kB kernel will take only a couple of seconds typically. With +100Mbit Ethernet it gets even better.</p> + +<p class="c7">Compared to booting from solid-state devices, e.g. +Flash disks, Etherboot has the advantage of centralising software +adminstration, the tradeoff being the dependence on a server. This +can be partly alleviated by providing redundant servers.</p> + +<p class="c7">Etherboot can work with RAM disks, NFS filesystems, +or even local disks, if desired. It's a component technology and +can be combined with other technologies to do things the way you +want.</p> + +<p class="c7">Etherboot is usually used to load Linux, FreeBSD or +DOS. However the protocol and boot file formats are general, so +there is no reason why it could not be used to load arbitrary +images to a PC, including other OSes.</p> + +<p class="c7">Etherboot is Open Source under the GNU General Public +License Version 2 (GPL2).</p> + +<p class="c7">The components needed by Etherboot are</p> + +<ul class="c11"> +<li>A bootstrap loader, usually in an EPROM on a network card, or +installed in the flash BIOS, but could be put anywhere in the +address space the BIOS probes in. For testing this could be put on +a floppy disk or a hard disk partition. Some configurations may +even be always run from a floppy disk (e.g. temporary testing +setups or pedagogic uses).</li> + +<li>A DHCP or bootp server, for returning an IP address and other +information when sent a MAC (Ethernet card) address.</li> + +<li>A tftp server, for sending the kernel images and other files +required in the boot process. Alternatively, Etherboot can boot +from an NFS mount.</li> + +<li>A Linux or FreeBSD kernel.</li> + +<li>Optionally, a NFS server, for providing the disk partitions +that will be mounted if Linux or FreeBSD is being booted.</li> + +<li>Optionally, a RAM disk contained in the loaded image. This can +be the initial RAM disk if desired.</li> + +<li>Software tools for building the download image, and tools for +debugging.</li> +</ul> +</blockquote> |