208 lines
4.9 KiB
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208 lines
4.9 KiB
HTML
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<TITLE>Boot + Root + Raid + Lilo : Software Raid mini-HOWTO: Appendix C. - ide RAID10 with initrd</TITLE>
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<H2><A NAME="s7">7. Appendix C. - ide RAID10 with initrd</A></H2>
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<P>RAID1 over striped RAID0 pair.... the disks in the RAID0 sets are not
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quite the same size, but close enough.
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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 and /dev/md3 are the two RAID0 sets autostarted by the kernel
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/dev/md2 is the root partition and is 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 118531 76485 35925 68% /
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/dev/md0 1917 1361 457 75% /boot
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# ----------------------------
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fdisk -ul /dev/hda
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Disk /dev/hda: 4 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 4231 2093 fd Linux raid autodetect
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/dev/hda2 4232 166151 80960 fd Linux raid autodetect
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# ----------------------------
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fdisk -ul /dev/hdb
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Disk /dev/hdb: 5 heads, 17 sectors, 981 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/hdb1 17 83384 41684 fd Linux raid autodetect
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# ----------------------------
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fdisk -ul /dev/hdc
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Disk /dev/hdc: 7 heads, 17 sectors, 1024 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 17 84013 41998+ fd Linux raid autodetect
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/dev/hdc2 84014 121855 18921 82 Linux swap
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# ----------------------------
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fdisk -ul /dev/hdd
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Disk /dev/hdd: 4 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/hdd1 46 4231 2093 fd Linux raid autodetect
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/dev/hdd2 4232 166151 80960 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/hda1
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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/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/hdd2
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raid-disk 0
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device /dev/hdb1
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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 0
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device /dev/md3
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raid-disk 1
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raiddev /dev/md3
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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/hda2
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raid-disk 0
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device /dev/hdc1
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raid-disk 1
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# ----------------------------
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contents of linuxrc
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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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# start raid 1 made of raid 0's
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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
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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/md4
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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/hdb
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./dev/hdb1
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./dev/hdb2
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./dev/hdb3
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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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</PRE>
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