Boot + Root + Raid + Lilo : Software Raid mini-HOWTO: Appendix B. - SCSI reference implementation RAID5

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## 6. Appendix B. - SCSI reference implementation RAID5

4 disk SCSI RAID5

     df
    Filesystem           1k-blocks      Used Available Use% Mounted on
    /dev/md0              11753770   2146076   9000678  19% /
    /dev/md1                 15739       885     14042   6% /boot

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

     fdisk -ul /dev/sda

    Disk /dev/sda: 64 heads, 32 sectors, 4095 cylinders
    Units = sectors of 1 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
    /dev/sda1            32     32767     16368   fd  Linux raid autodetect
    /dev/sda2         32768    292863    130048    5  Extended
    /dev/sda3        292864   8386559   4046848   fd  Linux raid autodetect
    /dev/sda5         32800    260095    113648   82  Linux swap
    /dev/sda6        260128    292863     16368   83  Linux native - test

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

     fdisk -ul /dev/sdb

    Disk /dev/sdb: 64 heads, 32 sectors, 4095 cylinders
    Units = sectors of 1 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
    /dev/sdb1            32     32767     16368   fd  Linux raid autodetect
    /dev/sdb2         32768    292863    130048    5  Extended
    /dev/sdb3        292864   8386559   4046848   fd  Linux raid autodetect
    /dev/sdb5         32800    260095    113648   82  Linux swap
    /dev/sdb6        260128    292863     16368   83  Linux native - test

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

    # fdisk -ul /dev/sdc

    Disk /dev/sdc: 64 heads, 32 sectors, 4095 cylinders
    Units = sectors of 1 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
    /dev/sdc2            32    292863    146416    5  Extended
    /dev/sdc3        292864   8386559   4046848   fd  Linux raid autodetect
    /dev/sdc5            64    260095    130016   83  Linux native - development
    /dev/sdc6        260128    292863     16368   83  Linux native - test

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

     fdisk -ul /dev/sdd

    Disk /dev/sdd: 64 heads, 32 sectors, 4095 cylinders
    Units = sectors of 1 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
    /dev/sdd2            32    292863    146416    5  Extended
    /dev/sdd3        292864   8386559   4046848   fd  Linux raid autodetect
    /dev/sdd5            64    260095    130016   83  Linux native - development
    /dev/sdd6        260128    292863     16368   83  Linux native - test

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

    # raidtab
    #
    raiddev /dev/md0
            raid-level      5
            nr-raid-disks   4
            persistent-superblock 1
            chunk-size      32

    # Spare disks for hot reconstruction
            nr-spare-disks  0
            device          /dev/sda3
            raid-disk       0
            device          /dev/sdb3
            raid-disk       1
            device          /dev/sdc3
            raid-disk       2
            device          /dev/sdd3
            raid-disk       3

    # boot partition
    #
    raiddev /dev/md1
            raid-level      1
            nr-raid-disks   2
            persistent-superblock 1
            chunk-size      32

    # Spare disks for hot reconstruction
            nr-spare-disks  0
            device          /dev/sda1
            raid-disk       0
            device          /dev/sdb1
            raid-disk       1

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

    # cat lilo.conf.sda
    # GLOBAL SECTION
    # device containing /boot directory
    disk=/dev/md0
    # geometry
      bios=0x80
      sectors=32
      heads=64
      cylinders=4095
    # dummy
      partition=/dev/md1
    # start of device "disk" above
      start=32

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

    image=/boot/bzImage
    root=/dev/md0
    label=LinuxRaid
    read-only

    # ------------------------
    # cat lilo.conf.sdb
    # GLOBAL SECTION
    # device containing /boot directory
    disk=/dev/md0
    # geometry
      bios=0x80
      sectors=32
      heads=64
      cylinders=4095
    # dummy
      partition=/dev/md1
    # start of device "disk" above
      start=32

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

    image=/boot/bzImage
    root=/dev/md0
    label=LinuxRaid
    read-only

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