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# Latest Version
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#	http://www.1U-Raid5.net/ChunkStride/stride.txt
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# 11-Jan-02 amo Date-of-Birth
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# What should the value be for stride ??
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# is stride the same as stripe size ??  ( i think its interchangeably used ?? )
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#	RAID-0,4 and 5 use stripes
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#	mke2fs -b 4096 -R stride=32 ... /dev/md0
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#		typically 32K, 64K stripe size
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#		-R stride flag is used to tell the file system about the size of the RAID stripes.
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#	For a "-b 4096" block file system, with stripe size 256KB, one would use -Rstride=64   ( 256K/4K )
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#
#	stripe size is a Multiple of 2  ( especially important if using 3 or 5 disks )
#	------------------------------
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# http://www.geocrawler.com/archives/3/57/1999/9/0/2699124/
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#	keep your stripe unit close to the maximum read size of your physical disk
#		( multiple of the disk`s track size, in sectors)
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#
# http://mail.nl.linux.org/linuxperf/1999-05/msg00248.html
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#	Build the stripe set with your chosen ( 64K ) chunk size across 4 disks:
#		mdcreate -c64k raid0 /dev/md2 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
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#		mdadd /dev/md2; mdrun /dev/md2
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#	use 4k blocks, 16k inodes
#		mke2fs -b 4096 -i 16384 -R stride=64 /dev/md2
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#	the optimal stride is given by:
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#		 chunk size 
#	stride = ----------  *  ( num disks )  = 16 * 4 = 64
#		 block size
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# http://www.cs.helsinki.fi/linux/linux-kernel/2001-44/0337.html
#	http://www.dandelion.com/Linux/README.DAC960
#	/usr/src/linux/Documentation/README.DAC960
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#	DAC960 controller's 64KB default stripe size  ( 64K / 4K == 16 )
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#	mke2fs -b 4096 -R stride=16 /dev/xx
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# http://www.1U-Raid5/Testing/raid_testing.sh.txt
	#
	#
	EXT2BLOCKSIZE=4096   	# or 1024 or ???
	#
	for CHUNKSIZE in 4 8 16 32 64 128 256 512
	do
	        stride=$(( $CHUNKSIZE * 1024 / $EXT2BLOCKSIZE ))
		..
		.. create new /etc/raidtab and run the test
		..
		mke2fs -b $EXT2BLOCKSIZE -m 1 -Rstride=$stride /dev/mdxx
		..
		mount /dev/mdxx
		..
		# whatever test ..
		tiobench 
		bonnie
		dd
		..
	done
	#
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# Fastrack Raid stripping across drives
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http://www6.tomshardware.com/storage/20000329/fastrak66-14.html
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