NFS  Ʈ  ý Ʈϱ(nfsroot)
===============================================

Gero Kuhlmann <gero@gkminix.han.de> 1996⿡ 
Martin Mares <mj@atrey.karlin.mff.cuni.cz> 1997⿡ ħ
 <xunil@linuxfan.com> 1999 6 ű


࿡ X-͹̳̳   ũ  ý 
Ѵٸ Ʈ  ý ũ ƴ   ؾѴ. 
ũٰ   ְ NFS ؼ   ִ.   
Ʈ  ý  NFS  °  ̴. 
 "Ŭ̾Ʈ"  ũ  ý ϴ ̰, 
""  NFS  ϴ ̴.

1. nfsroot Ȱȭ Ű

nfsroot  ؼ Ŀ  NFS ϵ ؾѴ. 
⼭ NFS  ϸ  ȴٴ  ϶. 
 ũƮ  nfsroot    ̰, 
 ̶ Ѵٸ  ڵ  ý    ̴. 
BOOTP RARP  ϴ.

2. Ŀ ɾ 

Ŀ Ʈ δ(loadlin, LILO, ƮƮ Ʈ α׷͵)  
ε Ǹ  Ʈ  ý ̽ ,   ã, 
 Ʈ Ʈ 丮 ̸  ˾ƾ Ѵ. 
̰͵ Ŀ ɾ  Ķ͵ ذ   ִ.

root=/dev/nfs

̰  NFS ̽ Ȱȭ Ű ؼ ʿϴ. 
  ̰ ¥ ̽ Ƴ  Ŀο ¥ ̽  
NFS  ִ Ϳ Ұϴٴ ̴. 

nfsroot=[<server-ip>:]<root-dir>[,<nfs-options>]

࿡ nsfroot ĶͰ Ѱ ʴ´ٸ Ʈ "/tftpboot/%s"   ̴.

<server-ip> 	NFS  IP ּҸ ˷ش. 
		̰ ٸ ؿ  ip     ̴.
		 Ķʹ RARP NFS  ٸ    
		ϴ  δ. 

<root-dir>	 Ʈ Ʈ 丮 ̸. ⿡ "%s" 
		ִٸ %s Ŭ̾Ʈ IP ּ ƽŰ · ٲ̴.

<nfs-options>	⺻ NFS ɼǵ.  ɼ ޸ еȴ. ɼ ʵ尡
		 ִٸ  ⺻  ̴.
			port	=  Ʈ   ־ 
			rsize	= 1024
			wsize	= 1024
			timeo	= 7
			retrans	= 3
			acregmin= 3
			acregmax= 60
			acdirmin= 30
			acdirmax= 60
			flags	= hard, nointr, noposix, cto, ac

ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>

 Ķʹ Ŀο ̽ IP ּҳ IP  ̺  ġ
ΰ ˷ش.  κ  "nfsaddrs" ҷ  Ʈ  
IP  NFSʹ  ̷  "ip" ٲ  ̸
ȣȯ  alias  ִ.  

 ĶͰ Ŀ ɾ ο  ִٸ,  ʵ ٰ ϰ,
  ⺻ ȴ. Ϲ Ŀ  RARP BOOTP
(Ŀ   õǾ ޷ִ.) ̿Ѵٴ  ǹѴ.

<client-ip> 	Ŭ̾Ʈ IP ּ.  ٸ RARP BOOTP  
		ȴ.     Ŀ  
		̳ <autoconf> ĶͿ ޷ִ.  ʴٸ
		RARP BOOTP  ʴ´.

<server-ip>	NFS  IP ּ. ࿡ RARP Ŭ̾Ʈ ּҸ 
		߰  ĶͰ  ʴٸ  ⼭  
		޾Ƶ鿩. RARP NFS ٸ Ϸ RARP 
		⿡ .(Ȥ ĭ ܳ), ׸ NFS 
		"nfsroot"ĶͿ ָ ȴ.  Ⱑ  ִٸ
		RARP BOOTP   NFS  ̴.

<gw-ip>		 ٸ ݿ  Ʈ IP ּ.
		Ⱑ  ִٸ Ʈ ̴  ʰ  
		Ʈũ ִٰ ϰų BOOTP ˷  .

<netmask>	 Ʈũ ̽  ݸũ.
		 ִٸ Ŭ̾Ʈ IP ּҿ    ݸũ
		δ. ƴ BOOTP  ǰų.

<hostname>	Ŭ̾Ʈ ̸. ٸ Ŭ̾Ʈ IP ּҴ ƽŰ 
		ǥ ̰ų BOOTP   δ.

<device>	 Ʈũ ̽ ̸. ٸ RARP BOOTP û 
		 ̽ ̰    ȴ. ϳ
		̽ ִٸ ⸦ ĭ ܵξ . 

<autoconf>	ڵ  . ⼭  RARP BOOTP δ.
		Ѵ ϰų дٸ Ŀ    δ.
		"off" ڵ  ٴ ̴.

<autoconf> Ķʹ ڵ   "ip" ĶͿ ':' ܵ   ִ.

3. Ŀ δ

Ŀ ޸𸮷 ø     ִµ   
Ѱ ޷ ִ.

3.1 dd Ἥ Ŀ ÷ǿ 
	׻ ϴ dd Ἥ Ŀ ÷ǿ   ִ.
	 Ŀ ɾ    . ׷, "root="Ķ͸
	üϱ ؼ mknod ̿  ѹ 0, ̳ ѹ 255¥
	 ̽ Ѵ.
	
		mknod /dev/boot255 c 0 255

	 Ŀ, zImage  dd ÷ǿ ض.
	
		dd if=/usr/src/linux/arch/i386/boot/zImage of=/dev/fd0

	׸  rdev Ἥ Ʈ ̽ .
	
		rdev /dev/fd0 /dev/boot255

	⿡ ´ ¥ ̽   /dev/boot255   ȴ. 	
	ٸ ΰ Ŀ ɾ Ķʹ rdev ٲ    RARP
	BOOTP  ⺻   ̴. ࿡ RARP 
	 ޾Ҵٸ /tftpboot/<client-ip>/  Ʈ 丮 Ʈ
	 ̰, BOOTP   ޾Ҵٸ 信 ԵǾ ִ
	丮 ̸ Ʈ Ʈ ɰ̴.

3.2	LILO 
	θ ٸ  Ͽ "append="  ʿ 
	Ķ͵   ִ. "root="   ؼ 3.1 
	ߴ ó   ̽  Ѵ. ο "append="
	  Ϳ     ϶.

3.3	loadlin 
	ڽ ϵ ũ Ʈ Ʈϱ   Ʈ
	 Ϸ Ѵٸ ε帰  ȴ.   Ѵٴ 
	   غ ʾҴ.  ο  ó
	Ŀ ɾ     ̴.	 ˷ ε帰 
	϶.

3.4.	Boot ROM 
	  ũ  Ŭ̾Ʈ ýŰ  õ  ̴.
	Ʈ   TFTP  Ἥ Ŀ εѴ.
	 ƴ ѵ  Ʈũ    ϴ 
	 Ʈ  sunsite.unc.edu ̷ Ʈ  
	 ΰ Ʈ ִµ "netboot-nfs" "etherboot" Ѵ.
	Ѵٴ ũ   Ŭ̾Ʈ ýŰµ ʿ 
	 ִ.

4.	ũƮ
	Ŀ nfsroot ڵ RARP   
	Gero Kuhlmann(gero@gkminix.han.de) ۼߴ.

	IP  ڵ ڵ  
	Martin Mares(mj@atrey.karlin.mff.cuni.cz) ۼߴ.

	nfsroot ʱȭ   ؼ Jens-Uwe Mager(jum@anubis.han.de)
	  Ѵ.
