#
#
# For Information about Compiling Raid into your linux Kernel
# -----------------------------------------------------------
#	raid.uhow2
#
#
# Checking the proper verions
# ---------------------------
#	mkraid -V
#		mkraid version 0.90.0
#
#
# Create the Raid Config Files
# ----------------------------
#	/etc/raid0.conf
#	/etc/raid1.conf
#	/etc/raid5.conf
#
#	cd /etc ; ln -s raid5.conf raidtab
#
#
# Create the Raid Devices
# ------------------------
#	mkraid /dev/md0
#	mkraid --really-force /dev/md0
#		- to overwrite prev raid filesystems
#
# See whether the Raid device was created
# ---------------------------------------
# 	 cat /proc/mdstat
#
# Create the raid filesystem
# --------------------------
# 	mke2fs -c /dev/md0
#	mke2fs -b 4096 -m 1 -R stride=32 /dev/md0
#	mke2fs -b 4096 -R stride=16 /dev/md0
#
# Check the raid filesystem
# --------------------
#	e2fsck /dev/md0
#
# Mount the Raid Filesystem
# -------------------------
#	mkdir /Raid
#	mount /dev/md0 /Raid
#
# Test by writing a file to the Raid FileSystem
# ---------------------------------------------
#	dd if=/dev/zero of=/Raid/test count=1000000
#		www:~# ls -l /Raid
#		-rw-r--r--   1 root     root     512000000 Feb 13 13:11 test
#	bonnie tests
#
#	stress.sh tests
#
# Normal Umount
# --------------
#	umount /raid
#
#
# Stop the Raid FileSystem
# ------------------------
#	raidstop /dev/md0
#
#	 cat /proc/mdstat
#		Personalities : [linear] [raid0] [raid1] 
#		read_ahead 1024 sectors
#		unused devices: <none>
#
# Start the Raid FileSystem
# -------------------------
#	raidstart /dev/md0
#	raidstart -a
#	raidrun -a
#
#	cat /proc/mdstat
#		Personalities : [linear] [raid0] [raid1] 
#		read_ahead 1024 sectors
#		md0 : active raid1 hdd1[1] hdc1[0] 11255040 blocks [2/2] [UU] resync=0% finish=53.3min
#		unused devices: <none>
#
# Monitor Your Raid FileSystem
# ----------------------------
#	see raid_monitor.*
#
#
# If a drive fails while online:
# -----------------------------
#	raidhotremove /dev/md0 /dev/sdb2
#	raidhotadd /dev/md0 /dev/sdb2
#
# -----------------------------------------------------------------
#
# Testing the array
# =================
# 1.  Write some large files... and compare them
#
#	mount /dev/md0 /Raid
#	dd if=/dev/null of=/Raid/test1 count=4000000	( about 2Gb files )
#	dd if=/dev/null of=/Raid/test2 count=4000000
#	diff /Raid/test1 /Raid/test2
#	umount /dev/md0 /Raid
#
# 2.  Pull one of the drives out if it is raid5 setup - nothing should be lost
#
#	dd if=/dev/null of=/Raid/test3 count=4000000	- create a new file
#
#
# 3.  Insert the original "simulated bad disk"		- should resync the array
#
#
# --------------------------------------------------------------
#
# stress.sh
#
# modprobe raid5
# lsmod
#
# hdparm -t /dev/md0 
#
# hdparm -Tt	to see both buffer-cache and buffered disk read timings.
#
# Benchmarks:
#	www.acnc.com/benchmarks.html	 AC&NC | RAID and Disk Storage Benchmarks
#
# Bonnie
#	 www.spin.ch/~tpo/bench
#
# Malcolm Beattie <mbeattie@sable.ox.ac.uk>
#	hdparm /dev/hda (and the other disks) shows you have using_dma and unmaskirq set to 1.
#
#
# ***************** RAID0: 4KB chunk, 1KB block, stride=4
# bonnie -s 512 -m "raid0,4k" -d /zh
#
# ***************** RAID0: 32KB chunk, 4KB ext2 block, stride=8
[root@iam /zu]# bonnie -s 512 -m "raid0,32k,4k,8" -d /zg
#
# Bonnie -s 1024 -m king
#
#
# Contributers
# ------------
#	Malcolm Beattie <mbeattie@sable.ox.ac.uk>
#	Richard Jones <rich@bibliotech.co.uk>
#
# end of file