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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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