#
# -----------------------------------
# Commands used for working with Raid
# -----------------------------------
#
#
# Latest Version:
# ==============
#	http://www.1U-Raid5/HowTo/Commands.uhow2.txt
#
#
#	http://www.cse.unsw.edu.au/~neilb/source/mdadm/
#	http://www.{countrycode}.kernel.org/pub/linux/utils/raid/mdadm/
#
#
# 04-21-99 amo Date-of-Birth
# 08-28-04 amo Added more commands
# 05-26-05 amo Added more mdadm commands
#
#
#
# To Define your Raid Array
# -------------------------
#	ln -s /etc/raidxx.conf /etc/raidtab
#
#
# To Stop and Start the Raid Array
# --------------------------------
#	 /etc/init.d/raid2 stop
#	 /etc/init.d/raid2 start
#
#	-- or --
#
#	raidstop  /dev/md0
#	raidstart /dev/md0
#
#
#	mdadm --stop /dev/md4
#
#
#
# Config Files
# ------------
#	 /etc/{raid}/raidtab
#		raidstart -a
#
#	/etc/mdtab
#		mdadd -ar	( mdcreate )
#
#
# To Create the Raid Devices
# --------------------------
#
#	raidadd -a
#		md0 : inactive hdc1 hde1 16402302 blocks
#
#	raidrun /dev/md0
#		md0 : active raid0 hdc1 hde1 16401920 blocks 256k chunks
#		-- turn it on
#
#	raidstart /dev/md0
#
#
#
# To Initialize Raid
# ------------------
#	mkraid -V	- version info
#       mkraid /dev/md0
#
#	mkraid -force /dev/md0
#
#	mkraid -c /etc/raidtab /dev/md0
#		mkraid is only relevant for RAID 1, 4, and 5 devices
#		mkraid: aborted
#
#       - or -
#
#    http://www.cse.unsw.edu.au/~neilb/source/mdctl/mdctl-0.5.tgz
#	mdctl --assemble [ --force ] /dev/md0 /dev/hdc1 /dev/hde1 /dev/hdg1
#
#    http://www.cse.unsw.edu.au/~neilb/source/mdadm/
#    http://acd.ucar.edu/~fredrick/linux/fedoraraid/
#
#
#	mdadm --stop /dev/md4
#	mdadm --zero-superblock /dev/hda1
#	mdadm --zero-superblock /dev/hdb1
#
#
#	mdadm --version
#
#	mdadm -QE --scan
#
#	mdadm --detail /dev/md0
#
#	mdadm --detail --scan
#
#
#	mdadm --examine /dev/sda1
#	mdadm --examine /dev/sdb1
#	mdadm --examine /dev/sdc1
#
#	mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 
#
#	mdadm --create /dev/md0 --verbose --level=mirror --raid-devices=2 /dev/sdb1 /dev/sdc1
#
#	# resync ??
#	mdadm --assemble --run --force --update=resync /dev/md2 /dev/sbd3  /dev/sbd4 /dev/sbd5
#
#	???
#	mdadm -R -A /dev/md0 /dev/hdx /dev/hdy
#
#	# hotadd a disk
#	mdadm /dev/md0 -a /dev/hdg1
#	mdadm /dev/md0 --force -a /dev/hdg1
#
#
#	#
#	# stop and rebuild it
#	#
#	mdadm --stop --scan
#	mdadm --assemble /dev/md0 --auto --scan --update=summaries --verbose
#
#	#
#	# Monitoring the sw raid
#	#
#	nohup mdadm --monitor --mail=RaidSupport@your-domain.com --delay=300 /dev/md0 
#
#
#
# To Check if its recognized
# --------------------------
#	cat /proc/mdstat
#		Personalities : [1 linear] [2 raid0] [3 raid1] [4 raid5]
#		read_ahead 128 sectors
#		md0 : active raid0 hdc1 hde1 16401920 blocks 256k chunks
#		md1 : inactive
#
#	mdadm -A /dev/hde1
#
#	lsraid -a /dev/md0 
#
#
# To Format a NEW raid device
# ---------------------------
#	mkfs.ext2 /dev/md0
#		mke2fs -b 4096 -R stride=16 /dev/md0
#		mke2fs -m 1 /dev/md0
#
#		mke2fs -b 4096 -i 16384 -R stride=32 -s sparse-super-flag /dev/md0
#
#		tune2fs -c 1 -i 1d -m 10 /dev/md0
#
#
#	- for Ext3 Journeling FS  ( download new e2fsprogs-1.25 )
#	- define ext3 in /etc/fstab
#	mke2fs -j /dev/md0
#
#	-- or --
#
#	mkreiserfs /dev/md0
#
#
# 
# To Check the formating before mounting
# --------------------------------------
#	e2fsck /dev/md0
#
#	e2fsck -yf /dev/md0	- just fix it  ( very dangerous though )
#
#
# To Mount and use the Raid devices
# ---------------------------------
#	mkdir /Raid5 ; mount /dev/md0 /Raid5
#
#
# To Un-mount the Raid devices
# ----------------------------
#	umount /Raid5
#
# To Stop Raid
# ------------
#	raidstop /dev/md0
#	cat /proc/mdstat	-- to verify devices not listed
#
# To Restart Raid
# ---------------
#	raidstart /dev/md0
#	raidstart -a
#	raidrun -a
#	cat /proc/mdstat	-- to verify devices not listed
#
#
# HotAdd and Remove /dev/sdb
# -----------------
#	mdadm /dev/md0 --fail /dev/sda1
#	mdadm /dev/md0 --remove /dev/sda1
#
#
# 	-- or --
#
#	raidhotremove -->> without running: "raidstop /dev/md0"
#	
#	raidsetfaulty /dev/md0 /dev/sdb2
#	raidhotremove /dev/md0 /dev/sdb2
#
#	-- after adding the new disk ... watch it resync
#	raidhotadd /dev/md0 /dev/sdb2
#
#	#
#	# to hotadd the new/missing device
#	#
#	mdadm /dev/md0 -a /dev/hdc1
#
#
# To View the raid devices
# -------------------------
#	mdadm --detail /dev/md0
#
#
# Test your RAID Systems
# ----------------------
#	http://www.1U-Raid5.net/Testing
#
#
# Backup data on your RAID systems
# --------------------------------
#	http://www.Linux-Backup.net
#
#
#
# end of file