262 lines
5.8 KiB
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262 lines
5.8 KiB
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<TITLE>Boot + Root + Raid + Lilo : Software Raid mini-HOWTO: Appendix D. - ide RAID1-10 with initrd</TITLE>
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<A HREF="Boot+Root+Raid+LILO.html#toc8">Contents</A>
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<H2><A NAME="s8">8. Appendix D. - ide RAID1-10 with initrd</A></H2>
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<P>This is a system made up of an assortment of odds and ends. The root mounted
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raid device is comprised of a RAID1 made up of one RAID0 array from odd
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sized disks and a larger regular disk partition.
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Examination of the lilo.conf files may give you better insight
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into the reasoning behind the various parameters.
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<P>
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<PRE>
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/dev/md0 is the /boot partition and is autostarted by the kernel
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/dev/md1 is one half of the mirror set for md2, autostarted by kernel
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/dev/hda3 is the other half of the mirror set for md2
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/dev/md2 is the RAID1 /dev/md1 + /dev/hda3, started by initrd
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df
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Filesystem 1k-blocks Used Available Use% Mounted on
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/dev/md2 138381 74421 56815 57% /
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/dev/md0 2011 1360 549 71% /boot
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# ----------------------------
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fdisk -ul /dev/hda
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Disk /dev/hda: 8 heads, 46 sectors, 903 cylinders
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Units = sectors of 1 * 512 bytes
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Device Boot Start End Blocks Id System
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/dev/hda1 46 4415 2185 fd Linux raid autodetect
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/dev/hda2 4416 43423 19504 82 Linux swap
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/dev/hda3 43424 332303 144440 83 Linux native
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# ----------------------------
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fdisk -ul /dev/hdc
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Disk /dev/hdc: 8 heads, 39 sectors, 762 cylinders
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Units = sectors of 1 * 512 bytes
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Device Boot Start End Blocks Id System
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/dev/hdc1 39 4367 2164+ fd Linux raid autodetect
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/dev/hdc2 4368 70199 32916 82 Linux swap
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/dev/hdc3 70200 237743 83772 fd Linux raid autodetect
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# ----------------------------
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fdisk -ul /dev/hdd
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Disk /dev/hdd: 4 heads, 39 sectors, 762 cylinders
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Units = sectors of 1 * 512 bytes
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Device Boot Start End Blocks Id System
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/dev/hdd1 39 118871 59416+ fd Linux raid autodetect
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# ----------------------------
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# raidtab
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#
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raiddev /dev/md0
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raid-level 1
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nr-raid-disks 2
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persistent-superblock 1
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chunk-size 8
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device /dev/hdc1
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raid-disk 1
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device /dev/hda1
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raid-disk 0
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raiddev /dev/md1
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raid-level 0
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nr-raid-disks 2
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persistent-superblock 1
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chunk-size 8
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device /dev/hdc3
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raid-disk 0
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device /dev/hdd1
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raid-disk 1
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raiddev /dev/md2
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raid-level 1
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nr-raid-disks 2
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persistent-superblock 1
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chunk-size 8
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device /dev/md1
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raid-disk 1
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device /dev/hda3
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raid-disk 0
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# ----------------------------
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cat linuxrc
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#!/bin/sh
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# ver 1.02 2-22-00
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#
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############# really BEGIN 'linuxrc' ###############
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#
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# mount the proc file system
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/bin/mount /proc
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# autostart /boot partition and raid0
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/bin/raidstart /dev/md2
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# tell the console what's happening
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/bin/cat /proc/mdstat
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# Everything is fine, let the kernel mount /dev/md2
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# tell the kernel to switch to /dev/md2 as the /root device
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# The 0x900 value is the device number calculated by:
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# 256*major_device_number + minor_device number
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echo "/dev/md2 mounted on root"
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echo 0x902>/proc/sys/kernel/real-root-dev
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# umount /proc to deallocate initrd device ram space
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/bin/umount /proc
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exit
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# ----------------------------
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contents of initrd.gz
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./bin
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./bin/ash
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./bin/echo
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./bin/raidstart
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./bin/mount
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./bin/umount
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./bin/cat
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./bin/sh
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./dev/tty1
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./dev/md0
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./dev/md1
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./dev/md2
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./dev/md3
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./dev/console
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./dev/hda
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./dev/hda1
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./dev/hda2
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./dev/hda3
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./dev/hdc
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./dev/hdc1
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./dev/hdc2
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./dev/hdc3
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./dev/hdd
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./dev/hdd1
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./dev/hdd2
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./dev/hdd3
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./dev/initrd
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./dev/ram0
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./dev/ram1
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./dev/ram2
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./dev/ram3
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./dev/ram4
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./dev/ram5
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./dev/ram6
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./dev/ram7
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./etc/raidtab
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./etc/fstab
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./lib/ld-2.1.2.so
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./lib/ld-linux.so.1
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./lib/ld-linux.so.1.9.9
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./lib/ld-linux.so.2
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./lib/ld.so
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./lib/libc-2.1.2.so
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./lib/libc.so.6
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./linuxrc
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./proc
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# ----------------------------
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cat lilo.conf.hda
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# GLOBAL SECTION
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# device containing /boot directory
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disk=/dev/md2
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# geometry
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bios=0x80
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cylinders=903
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heads=8
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sectors=46
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# geometry for 2nd disk
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# bios will be the same because it will have to be moved to hda
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# cylinders=762
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# heads=8
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# sectors=39
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# dummy
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partition=/dev/md0
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# start of device "disk" above
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start=46
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# second device
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# start=39
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# seem to have some trouble with 2.2.14 recognizing the right IRQ
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append = "ide1=0x170,0x376,12 ether=10,0x300,eth0 ether=5,0x320,eth1"
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boot=/dev/hda
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map=/boot/map
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install=/boot/boot.b
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initrd=/boot/initrd.gz
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image=/boot/zImage
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root=/dev/md2
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label=LinuxRaid
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read-only
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# ----------------------------
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cat lilo.conf.hdc
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# GLOBAL SECTION
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# device containing /boot directory
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disk=/dev/md2
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# geometry
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bios=0x80
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# cylinders=903
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# heads=8
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# sectors=46
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# geometry for 2nd disk
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# bios will be the same because it will have to be moved to hda
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cylinders=762
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heads=8
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sectors=39
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# dummy
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partition=/dev/md0
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# start of device "disk" above
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# start=46
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# second device
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start=39
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# seem to have some trouble with 2.2.14 recognizing the right IRQ
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append = "ide1=0x170,0x376,12 ether=10,0x300,eth0 ether=5,0x320,eth1"
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boot=/dev/hdc
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map=/boot/map
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install=/boot/boot.b
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initrd=/boot/initrd.gz
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image=/boot/zImage
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root=/dev/md2
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label=LinuxRaid
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read-only
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</PRE>
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<HR>
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Next
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<A HREF="Boot+Root+Raid+LILO-7.html">Previous</A>
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<A HREF="Boot+Root+Raid+LILO.html#toc8">Contents</A>
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