.\" -*- nroff -*- 
.\" This man-page is Copyright (C) 1997 John S. Kallal
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one
.\" 
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\" 
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and author(s) of this work.
.\"
.\" If the you wish to distribute versions of this work under other
.\" conditions than the above, please contact the author(s) at the following 
.\" for permission:
.\"	
.\"  John S. Kallal - 
.\"	email: <kallal@voicenet.com>
.\"	mail: 518 Kerfoot Farm RD, Wilmington, DE 19803-2444, USA
.\"	phone: (302)654-5478
.\"   
.\" $Id: initrd.4,v 1.1.1.1 1999/07/19 01:49:27 cvs Exp $
.\"
.\" Japanese Version Copyright (c) 1997,1998
.\"           ISHIKAWA Mutsumi, all rights reserved.
.\" Translated into Japanese Mon Dec 15 01:42:59 JST 1997
.\"         by ISHIKAWA Mutsumi <ishikawa@linux.or.jp> 
.\"
.\" Japanese Version Last Modified Mon Feb  9 15:58:33 JST 1998
.\"	by ISHIKAWA Mutsumi <ishikawa@linux.or.jp>
.\"
.TH INITRD 4 1997-11-06 "Linux 2.0" "Linux Programmer's Manual"
.SH ̾
initrd \- ֡ȥˤäƽ줿 RAM ǥ
.SH 
.B /dev/initrd
ڥեɤ߹ѤΥ֥åǥХǤ롣
.B /dev/initrd
ϥͥ뤬ư˥֡ȥ(boot loader)ˤä
(㤨С)ǥ(RAM disk)ǥХǤ롣
ͥϡθ
.BR /dev/initrd
֥åǥХƤ 2 ʳƥ൯ư(two
phased system boot-up)Ѥ뤳ȤǤ롣
.PP
ǽΥ֡ȥåʳ(first boot-up phase)Ǥϡͥ
(㤨С֡ȥˤäƽ줿 RAM disk Ǥ)
.B /dev/initrd
Ƥ롼ȥե륷ƥ(root file-system) Ȥƥޥ
Ƶư롣
ʳǤϽ롼ȥǥХ˴ޤޤƤΤ顢ɲäΥɥ饤
Ф䤽¾Υ⥸塼뤬ɤ롣
ɲäΥ⥸塼뤬ɤ줿塢롼ȥե륷ƥ(ʤ
̾Υ롼ȥե륷ƥ)̤ΥǥХޥȤ롣
.\"
.SH ֡ȥå׺
.BR initrd 
ѤϡƥϼΤ褦˥֡Ȥ:
.RS 0.2i
.PP
1. ֡ȥϥͥץ
.BR /dev/initrd
Ƥ˥ɤ롣
.PP
2. ͥ뵯ưͥ
.B /dev/initrd
ǥХƤŸ
.B /dev/ram0
˥ԡ롣ˡ
.BR /dev/initrd
λȤäƤ롣
.PP
3. ͥ
.B /dev/ram0
ǥХΥ롼ȥե륷ƥȤɤ߽񤭲ǽʷǥޥ
Ȥ롣
.PP
4. ⤷ؼ줿롼ȥե륷ƥब롼ȥե륷ƥ
(㤨
.BR /dev/ram0 )
Ʊʤ顢̤ͥΥ֡ȥ󥹤ΤκǸΥƥåפ
ά롣
.PP
5. ⤷
.BR /linuxrc
Ȥ¹Բǽʥե뤬롼ȥե륷ƥˤ󶡤
ƤС
.BR /linuxrc
桼 ID 0(ʤroot)θ¤Ǽ¹Ԥ롣
.RB ( /linuxrc
եϼ¹ԲǽѡߥåͿƤʤФʤʤ
.B /linuxrc
ʼ¹ԥեǤФ褯륹ץȤǤ⹽ʤ)
.PP
6. ⤷
.B /linuxrc
¹Ԥʤޤϡ
.B /linuxrc
μ¹Ԥλϡ̾롼ȥե륷ƥबޥȤ롣
(⤷
.BR /linuxrc
λ餫Υե륷ƥब롼ȥե륷ƥ
ޥȤƤΥͥư
\fBƤʤ (Ǥ)\fR
ߤΥͥ뤬ɤΤ褦ư뤫ϡ
.BR 
Υ򻲾ȤΤ)
.PP
7. ⤷̾롼ȥե륷ƥब
.BR /initrd
Ȥǥ쥯ȥäƤʤ顢
.B /dev/ram0
ǥХ
.BR /

.BR /initrd
˰ư롣
.BR /initrd
ǥ쥯ȥ꤬¸ߤʤϡ
.BR /dev/ram0
ϥޥȤ롣
(
.BR /

.BR /initrd
˰ܤ줿
.BR /dev/ram0
ϥޥȤʤη̡
.BR /dev/ram0
Ϥ᤿ץϤΤޤ޻ĤǤ롣
⤷
.BR /initrd
ǥ쥯ȥ꤬̾롼ȥե륷ƥ¸ߤ
.BR /linuxrc
λ
.BR /dev/ram0
Ǽ¹Ԥ줿ʤ餫Υץ³Ƥ
ͥư
.BR Ƥʤ(Ǥ)
ߤΥͥ뤬λɤΤ褦ư򤹤뤫ˤĤƤϡ
.BR 
򻲾ȤΤ)
.PP
8. ̤Υ֡ȥ(㤨С
.BR /sbin/init
εư)̾롼ȥե륷ƥǹԤ롣
.\"   
.SH ץ
.BR initrd
Ѥ˥ͥΥ֡ȥå˱ƶͿ֡ȥ
ϼΤ褦ʪ롢
.TP
.BI initrd= "ե͡"
.BR /dev/initrd
ƤȤƥɤեꤹ롣
.RB LOADLIN
Ǥϡϥޥɥ饤󥪥ץǤ롣
.RB LILO
Ǥϡ
.RB LILO
եǤ
.RB /etc/lilo.config
ˤƥޥɤȤѤʤФʤʤ
ΥץǻꤵեŵŪʾ gzip ̤줿ե
륷ƥ।᡼Ǥ롣
.TP
.B noinitrd
εưץ 2 ʳư̵ˤ롣
ͥ
.B /dev/initrd
ƤʤƱ̾Υ֡ȥåưԤ
ΥץѤȡ֡ȥˤäƥ˥ɤ줿
.B /dev/initrd
Ƥ¸롣
ĤޤꡢΥץѤˤäơ
.B /dev/initrd
Ƥ(֡ȰʳŪ)Ѥ뤳Ȥǽˤʤ롣ޤƤ
ե륷ƥ।᡼˸ꤵʤ

.B /dev/initrd
ǥХɤߤΤ߲ǽǤꡢƥεư 1 ٤ɤ߽Ф
Ǥʤ
.TP
.BI root= "device-name"
̾롼ȥե륷ƥȤƻȤǥХꤹ롣
.BR LOADLIN
Ǥϡϥޥɥ饤󥪥ץǤ롣
.BR LILO
Ǥϥޥɥ饤󥪥ץ󡢤ޤϡ
.BR LILO
եǤ
.BR /etc/lilo.config
Υץ饤ȤƻѤ롣
ΥץǻꤵǥХϡŬڤʥ롼ȥե륷ƥȤ
ƥޥȲǽʥǥХǤʤФʤʤ
.\"   
.\"   
.SH ̾롼ȥե륷ƥѹ
ǥեȤǤϡͥ
(㤨С
.B rdev
Ѥƥͥե˥åȤ줿Ρޤϡѥ˥
ͥեޤ줿)
ޤϡ֡ȥΥץˤäƻꤵ줿Τ̾롼
ȥե륷ƥȤƻȤ롣
NFS ޥȤ줿̾롼ȥե륷ƥѤ硢
.BR nfs_root_name

.BR nfs_root_addrs
֡ȥץ NFS Ϳ뤿ѤʤФʤʤ
NFS ޥȤ줿롼(ե륷ƥ)˴ؤƤΡܤˤ
ƤϡͥΥɥȥե
.BR nfsroot.txt
򻲾Ȥλ
롼ȥե륷ƥ˴ؤ롢ܤˤĤƤϡ
.BR LILO

.BR LOADLIN
ΥɥȤ򻲾Ȥλ
.PP
ޤ
.BR /linuxrc
ѤˤäƤ̾롼ȥե륷ƥǥХѹ뤳
Ǥ롣
.BR /linuxrc
Ѥơ̾롼ȥǥХѹ뤿ˤϡ
.BR /proc
ޥȤƤʤФʤʤ
.BR /proc
ޥȤ줿塢
.BR /linuxrc
¹Ի proc ե
.BR /proc/sys/kernel/real-root-dev ", "
.BR /proc/sys/kernel/nfs-root-name ", " 
.BR /proc/sys/kernel/nfs-root-addrs
˽񤭹ˤä̾롼ȥǥХѹ롣
/\" .BR /proc/sys/kernel/real-root-dev "."
(NFS ǤϤʤ)ʪŪʥ롼ȥǥХξ硢
.BR /linuxrc
ˤäƿ롼ȥե륷ƥΥǥХֹ椬
.BR /proc/sys/kernel/real-root-dev
˽񤭹ޤˤäơ롼ȥǥХѹ롣
NFS 롼ȥե륷ƥξ硢
.BR /linuxrc
ˤä NFS ꤬
.BR /proc/sys/kernel/nfs-root-name "  "
.BR /proc/sys/kernel/nfs-root-addrs 
˽񤭹ޤ졢
.BR /proc/sys/kernel/real-root-dev
( NFS ǥХʥСǤ) 0xff 񤭹ळȤˤäƥ롼
ǥХѹ롣
㤨СΥ륳ޥɥ饤̾롼ȥǥХ
.BR /dev/hdb1
ѹϤǤ롣
.nf
        echo 0x365 >/proc/sys/kernel/real-root-dev
.fi
ޤNFS ξ硢Τ褦ʥ륳ޥɥ饤ϥͥåȥ
 193.8.232.2 Ȥ IP ɥ쥹 NFS Ф
.BR /var/nfsroot
NFS ǥ쥯ȥ 193.8.232.7 Ȥ IP  idefix Ȥ̾Υ
ƥ̾롼ȥǥХȤƥޥȤ褦ѹϤǤ롣
.nf
	echo /var/nfsroot >/proc/sys/kernel/nfs-root-name
	echo 193.8.232.2:193.8.232.7::255.255.255.0:idefix \\
	  >/proc/sys/kernel/nfs-root-addrs
	echo 255 >/proc/sys/kernel/real-root-dev
.fi
.\"   
.\"   
.SH Ȥ
.BR initrd
Ūϡƥ।󥹥ȡˡ⥸塼벽줿
ͥǽˤ뤳ȤǤ롣
.PP
Τ褦ήΥƥ।󥹥ȡ뤬ǽˤʤ:
.RS 0.2i
.PP
1. ץϥեåԤ䡢¾Υǥߥ˥ͥ(㤨
С
.BR /dev/ram ", " /dev/initrd
 ext2 ե륷ƥΤߤΥݡȤͥ)֡Ȥ
gzip ̤줿ե륷ƥ।᡼
.BR /dev/initrd
˥ɤ롣
.PP
2.
.BR /linuxrc
μ¹Ԥˤꡢ(1) ̾롼ȥե륷ƥ(ʤǥХ
סǥХɥ饤Сե륷ƥ)Υޥ (2) ۥǥ(
СCD-ROM, ͥåȥơס) Τˤʤˤɬפꤹ롣
ϡ桼ؤ䤤碌ưС뤤ϤξԤˡȤ߹
碌ƻѤDz褹롣
.PP 
3. ˡ
.BR /linuxrc
³¹Ԥ뤳Ȥˤꡢ롼ȥե륷ƥफɬפʥ
塼ɤ롣
.PP
4. 롼ȥե륷ƥ֤(ʳǤϡ̾롼
ȥե륷ƥϴʥƥǤɬפϤʤ)
.PP
5.
.BR /proc/sys/kernel/real-root-dev
򥻥åȤ
.BR /proc
䡢ޥȤƤ̾ե륷ƥࡢ¾Υե륷ƥ
򥢥ޥȤ
.BR /linuxrc
μ¹Ԥλ롣
.PP
6. ͥϡ̾롼ȥե륷ƥޥȤ롣
.PP
7. ξ֤ǡޥȤ줿롼ȥե륷ƥϤΤޤޡѲ
ǽǤ롣ޤ֡ȥ򥤥󥹥ȡ뤹뤳ȤǤ롣
.PP
8. ֡ȥϡƥ൯ư˻Ѥ륫ͥ⥸塼Υ
Ȥޤ
.BR /dev/initrd
Υե륷ƥɤ褦ˡꤵ
(㤨С
.BR /dev/ram0
ǥХƤޥȤ롣Ǹˡ
.BR /dev/ram0
Υ᡼ե˽񤭽Ф)
.PP
ǡƥब֡Ȳǽˤʤ롣θ塢ˤ¾Υ󥹥ȡ
κȤԤǤ롣
.RE
.PP
嵭ưǤ
.BR /dev/initrd
ΥݥȤϡͥ礭ʥͥåͥ롢
ͥκƹۤʤˡ̾ΥƥǺѲǽǡ
Ѥ뤳Ȥˤ롣
.PP
2 ܤΥϡĤδΥͥåȥˤơۤʤΥϡ
ɥΥƥ Linux ư뤿Υ󥹥ȡԤ
Ǥ롣
Τ褦ʥξ硢ΥͥΥå(ŪˤϤä
ĤΥͥ)ΤߤѤƥͭϲǽʸ¤꾮
뤳Ȥ˾ޤǤ
ξ硢Ƥɬפʥ⥸塼ȶ˥ޥɥե롣
ơ
.B /linuxrc
ե롢ޤϡ
.B /linuxrc
¹ԤեΤߤۤʤäΤˤƤ
.PP
3 ܤΥϡѥǥǤѤǤ롣
롼ȥե륷ƥѡƥΰ֤Τ褦ʾ󤬥֡Ȼɬ
ʤᡢ
.B /dev/initrd
ɤ줿ƥϡ桼ؤ䤤碌伫ưФѲǽ
ɤΥåѤơ롼ȥե륷ƥޥȤǤ
롣
.PP
(¾ˤ⤿㤬)ǸȤơCD-ROM  Linux ǥ
ȥӥ塼ñ CD-ROM 饤󥹥ȡ뤹뤿
.BR initrd
ѤǤ
ǥȥӥ塼ϡեåԤѤ CD-ROM ľ
.BR /dev/initrd
ɤ뤿
.BR LOADLIN
ѤǤ롣
ޤ
.BR LILO
֡ȥեåԤȤäƥ֡ȤԤCD-ROM 
.BR /dev/initrd
̤Ƥ礭ʥǥ֡ȥȥåפ롣
.\"   
.\"   
.SH 
.B /dev/initrd
ɤ߹Ѥ˥֥åǥХǥ᥸㡼ʥС 1 ޥʡʥС
250 Ƥ롣
̡
.B /dev/initrd
νͭԤ
.B root.disk
Ǥꡢ⡼ɤ 400 (root ˤäɤ߽ФΤ߲ǽ) Ǥ롣
⤷Linux ƥब餫줿
.B /dev/initrd
եäƤʤä硢Τ褦ʥޥɤѤˤäƺ
Ǥ롣:
.nf
\fB
        mknod -m 400 /dev/initrd b 1 250
        chown root:disk /dev/initrd
\fP
.fi
ޤ
.BR /dev/initrd
Ѥ뤿ˤ "RAM disk"  "Initial RAM disk" (㤨С
.BR CONFIG_BLK_DEV_RAM=y

.BR CONFIG_BLK_DEV_INITRD=y
)ξΥݡȤľܥͥȤ߹ɬפǤ롣
.BR /dev/initrd
Ѥ硢RAM ǥɥ饤Ф⥸塼ȤƥɤϤǤ
ʤ
.\"   
.\"   
.SH ե
.I /dev/initrd
.br
.I /dev/ram0
.br
.I /linuxrc
.br
.I /initrd
.SH Ϣ
.BR chown (1),
.BR mknod (1),
.BR /dev/ram (4),
.BR freeramdisk (8),
.BR rdev (8),
ͥ륽ѥå˴ޤޤɥȥե
.I initrd.txt
LILO ΥɥȡLOADLIN ΥɥȡSYSLINUX Υɥȡ
.\"   
.\"   
.SH 
1. ߤΥͥǤϡ
.BR /dev/ram0

.BR /

.BR /initrd
˰ư줿˥ޥȤƤե륷ƥϡθ³Ū
ǽǤ롣
.BR /proc/mounts
ȥϹʤ
.PP
2. ߤΥͥǤϡ
.BR /initrd
ǥ쥯ȥ꤬¸ߤ
.BR /dev/ram0
򲿤餫ΥץѤƤꡢ餫Υե륷ƥबξ
ޥȤƤ硢
.BR /dev/ram0
ϴˤϥޥȤʤ
.BR /dev/ram0
˥ޥȤʤС
.BR /dev/ram0
ϥ˻ĤäƤޤϤǤ롣
.PP
3. 
.BR /dev/initrd
ѼԤϡ嵭ջǽҤ٤Ƥư˰¸٤ǤϤʤ
ư Linux ͥξΥСǤѹ뤫⤷
ʤ
.\"   
.SH 
.BR initrd
ǥХΤΥͥ륳ɤ Werner Almesberger
<almesber@lrc.epfl.ch>   Hans Lermen <lermen@elserv.ffm.fgan.de> 
äƽ񤫤줿
.BR initrd
ΤΥɤ Linux ͥȤ߹ޤ줿ΤϳȯԸС
Ǥä 1.3.73 Ǥ롣