Welcome to Linux Knowledge Base and Tutorial
"The place where you learn linux"
International Rescue Committe

 Create an AccountHome | Submit News | Your Account  

Tutorial Menu
Linux Tutorial Home
Table of Contents

· Introduction to Operating Systems
· Linux Basics
· Working with the System
· Shells and Utilities
· Editing Files
· Basic Administration
· The Operating System
· The X Windowing System
· The Computer Itself
· Networking
· System Monitoring
· Solving Problems
· Security
· Installing and Upgrading
· Linux and Windows

Glossary
MoreInfo
Man Pages
Linux Topics
Test Your Knowledge

Site Menu
Site Map
FAQ
Copyright Info
Terms of Use
Privacy Info
Disclaimer
WorkBoard
Thanks
Donations
Advertising
Masthead / Impressum
Your Account

Communication
Feedback
Forums
Private Messages
Surveys

Features
HOWTOs
News Archive
Submit News
Topics
User Articles
Web Links

Google
Google


The Web
linux-tutorial.info

Who's Online
There are currently, 62 guest(s) and 0 member(s) that are online.

You are an Anonymous user. You can register for free by clicking here

  

HOWTO Home

Current HOWTO: Boot + Root + Raid + Lilo : Software Raid mini-HOWTO


Boot + Root + Raid + Lilo : Software Raid mini-HOWTO: Appendix D. - ide RAID1-10 with initrd Next Previous Contents

8. Appendix D. - ide RAID1-10 with initrd

This is a system made up of an assortment of odds and ends. The root mounted raid device is comprised of a RAID1 made up of one RAID0 array from odd sized disks and a larger regular disk partition. Examination of the lilo.conf files may give you better insight into the reasoning behind the various parameters.

/dev/md0 is the /boot partition and is autostarted by the kernel
/dev/md1 is one half of the mirror set for md2, autostarted by kernel
/dev/hda3 is the other half of the mirror set for md2
/dev/md2 is the RAID1 /dev/md1 + /dev/hda3, started by initrd

df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/md2                138381     74421     56815  57% /
/dev/md0                  2011      1360       549  71% /boot

# ----------------------------

 fdisk -ul /dev/hda

Disk /dev/hda: 8 heads, 46 sectors, 903 cylinders
Units = sectors of 1 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hda1            46      4415      2185   fd  Linux raid autodetect
/dev/hda2          4416     43423     19504   82  Linux swap
/dev/hda3         43424    332303    144440   83  Linux native

# ----------------------------

 fdisk -ul /dev/hdc

Disk /dev/hdc: 8 heads, 39 sectors, 762 cylinders
Units = sectors of 1 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hdc1            39      4367      2164+  fd  Linux raid autodetect
/dev/hdc2          4368     70199     32916   82  Linux swap
/dev/hdc3         70200    237743     83772   fd  Linux raid autodetect

# ----------------------------

 fdisk -ul /dev/hdd

Disk /dev/hdd: 4 heads, 39 sectors, 762 cylinders
Units = sectors of 1 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hdd1            39    118871     59416+  fd  Linux raid autodetect

# ----------------------------

# raidtab
#
raiddev /dev/md0
        raid-level      1
        nr-raid-disks   2
        persistent-superblock   1
        chunk-size      8
        device          /dev/hdc1
        raid-disk       1
        device          /dev/hda1
        raid-disk       0

raiddev /dev/md1
        raid-level      0
        nr-raid-disks   2
        persistent-superblock   1
        chunk-size      8
        device          /dev/hdc3
        raid-disk       0
        device          /dev/hdd1
        raid-disk       1

raiddev /dev/md2
        raid-level      1
        nr-raid-disks   2
        persistent-superblock   1
        chunk-size      8
        device          /dev/md1
        raid-disk       1
        device          /dev/hda3
        raid-disk       0

# ----------------------------

 cat linuxrc
#!/bin/sh
# ver 1.02 2-22-00
#
############# really BEGIN 'linuxrc' ###############
#
# mount the proc file system
/bin/mount /proc

# autostart /boot partition and raid0
/bin/raidstart /dev/md2

# tell the console what's happening
/bin/cat /proc/mdstat

# Everything is fine, let the kernel mount /dev/md2
# tell the kernel to switch to /dev/md2 as the /root device
# The 0x900 value is the device number calculated by:
#  256*major_device_number + minor_device number
echo "/dev/md2 mounted on root"
echo 0x902>/proc/sys/kernel/real-root-dev

# umount /proc to deallocate initrd device ram space
/bin/umount /proc
exit

# ----------------------------

contents of initrd.gz

./bin
./bin/ash
./bin/echo
./bin/raidstart
./bin/mount
./bin/umount
./bin/cat
./bin/sh
./dev/tty1
./dev/md0
./dev/md1
./dev/md2
./dev/md3
./dev/console
./dev/hda
./dev/hda1
./dev/hda2
./dev/hda3
./dev/hdc
./dev/hdc1
./dev/hdc2
./dev/hdc3
./dev/hdd
./dev/hdd1
./dev/hdd2
./dev/hdd3
./dev/initrd
./dev/ram0
./dev/ram1
./dev/ram2
./dev/ram3
./dev/ram4
./dev/ram5
./dev/ram6
./dev/ram7
./etc/raidtab
./etc/fstab
./lib/ld-2.1.2.so
./lib/ld-linux.so.1
./lib/ld-linux.so.1.9.9
./lib/ld-linux.so.2
./lib/ld.so
./lib/libc-2.1.2.so
./lib/libc.so.6
./linuxrc
./proc

# ----------------------------

 cat lilo.conf.hda
# GLOBAL SECTION
# device containing /boot directory
disk=/dev/md2
# geometry
  bios=0x80
  cylinders=903
  heads=8
  sectors=46
# geometry for 2nd disk
# bios will be the same because it will have to be moved to hda
#  cylinders=762
#  heads=8
#  sectors=39

# dummy
  partition=/dev/md0
# start of device "disk" above
  start=46
# second device
#  start=39

# seem to have some trouble with 2.2.14 recognizing the right IRQ
  append = "ide1=0x170,0x376,12 ether=10,0x300,eth0 ether=5,0x320,eth1"

boot=/dev/hda
map=/boot/map
install=/boot/boot.b

initrd=/boot/initrd.gz

image=/boot/zImage
root=/dev/md2
label=LinuxRaid
read-only

# ----------------------------

 cat lilo.conf.hdc
# GLOBAL SECTION
# device containing /boot directory
disk=/dev/md2
# geometry
  bios=0x80
#  cylinders=903
#  heads=8
#  sectors=46
# geometry for 2nd disk
# bios will be the same because it will have to be moved to hda
  cylinders=762
  heads=8
  sectors=39

# dummy
  partition=/dev/md0
# start of device "disk" above
#  start=46
# second device
  start=39

# seem to have some trouble with 2.2.14 recognizing the right IRQ
  append = "ide1=0x170,0x376,12 ether=10,0x300,eth0 ether=5,0x320,eth1"

boot=/dev/hdc
map=/boot/map
install=/boot/boot.b

initrd=/boot/initrd.gz

image=/boot/zImage
root=/dev/md2
label=LinuxRaid
read-only

Next Previous Contents

The Linux Tutorial completely respects the rights of authors and artists to decide for themselves if and how their works can be used, independent of any existing licenses. This means if you are the author of any document presented on this site and do no wish it to be displayed as it is on this site or do not wish it to be displayed at all, please contact us and we will do our very best to accommodate you. If we are unable to accommodate you, we will, at your request, remove your document as quickly as possible.

If you are the author of any document presented on this site and would like a share of the advertising revenue, please contact us using the standard Feedback Form.


  
Show your Support for the Linux Tutorial

Purchase one of the products from our new online shop. For each product you purchase, the Linux Tutorial gets a portion of the proceeds to help keep us going.


Login
Nickname

Password

Security Code
Security Code
Type Security Code


Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

Help if you can!


Amazon Wish List

Did You Know?
You can choose larger fonts by selecting a different themes.


Friends



Tell a Friend About Us

Bookmark and Share



Web site powered by PHP-Nuke

Is this information useful? At the very least you can help by spreading the word to your favorite newsgroups, mailing lists and forums.
All logos and trademarks in this site are property of their respective owner. The comments are property of their posters. Articles are the property of their respective owners. Unless otherwise stated in the body of the article, article content (C) 1994-2013 by James Mohr. All rights reserved. The stylized page/paper, as well as the terms "The Linux Tutorial", "The Linux Server Tutorial", "The Linux Knowledge Base and Tutorial" and "The place where you learn Linux" are service marks of James Mohr. All rights reserved.
The Linux Knowledge Base and Tutorial may contain links to sites on the Internet, which are owned and operated by third parties. The Linux Tutorial is not responsible for the content of any such third-party site. By viewing/utilizing this web site, you have agreed to our disclaimer, terms of use and privacy policy. Use of automated download software ("harvesters") such as wget, httrack, etc. causes the site to quickly exceed its bandwidth limitation and are therefore expressly prohibited. For more details on this, take a look here

PHP-Nuke Copyright © 2004 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.
Page Generation: 0.35 Seconds