Iozone

The standard command I use is as follows:

iozone -s 1024m -r 32k -i 0 -i 1 -i 2 -+n -t 1

Western Digital

WDC WD1600JD-75H

        Children see throughput for  1 initial writers  =   49564.20 KB/sec
        Children see throughput for  1 readers          =   59590.32 KB/sec
        Children see throughput for 1 random readers    =    8309.17 KB/sec
        Children see throughput for 1 random writers    =   22801.88 KB/sec

WDC WD1200JB-75CRA0

        Children see throughput for  1 initial writers  =   46014.13 KB/sec
        Children see throughput for  1 readers          =   40067.62 KB/sec
        Children see throughput for 1 random readers    =   11244.67 KB/sec
        Children see throughput for 1 random writers    =   16124.12 KB/sec

WDC WD3200JS-60P

        Children see throughput for  1 initial writers  =   70735.41 KB/sec
        Children see throughput for  1 readers          =   61879.04 KB/sec
        Children see throughput for 1 random readers    =   12072.48 KB/sec
        Children see throughput for 1 random writers    =   22518.14 KB/sec

(3 Drives in LVM)

        Children see throughput for  1 initial writers  =   64858.33 KB/sec
        Children see throughput for  1 readers          =   64913.92 KB/sec
        Children see throughput for 1 random readers    =   33801.48 KB/sec
        Children see throughput for 1 random writers    =   71252.03 KB/sec

WDC WD5000AAJB-00UHA

This is the drive through an IEEE1394 Firewire connection:

This was also done on a FAT32 partition.

        Children see throughput for  1 initial writers  =   26731.99 KB/sec
        Children see throughput for  1 readers          =   29232.09 KB/sec
        Children see throughput for 1 random readers    =    8226.97 KB/sec
        Children see throughput for 1 random writers    =   24798.85 KB/sec

Now, with an ext3 filesystem installed:

        Children see throughput for  1 initial writers  =   27004.33 KB/sec
        Children see throughput for  1 readers          =   28917.23 KB/sec
        Children see throughput for 1 random readers    =    8041.50 KB/sec
        Children see throughput for 1 random writers    =   11330.02 KB/sec

Finally, in a RAID 5 array, 2+1 configuration, XFS formatted, software RAID:

        Children see throughput for  1 initial writers  =   18200.69 KB/sec
        Children see throughput for  1 readers          =   35551.36 KB/sec
        Children see throughput for 1 random readers    =    8121.42 KB/sec
        Children see throughput for 1 random writers    =   14548.73 KB/sec

Maxtor

Maxtor 54098U8

        Children see throughput for  1 initial writers  =   25403.75 KB/sec
        Children see throughput for  1 readers          =    5227.56 KB/sec
        Children see throughput for 1 random readers    =    6036.05 KB/sec
        Children see throughput for 1 random writers    =    9144.35 KB/sec

Seagate

ST373405LW

        Children see throughput for  1 initial writers  =   48671.05 KB/sec
        Children see throughput for  1 readers          =   54253.02 KB/sec
        Children see throughput for 1 random readers    =   16231.61 KB/sec
        Children see throughput for 1 random writers    =   42183.82 KB/sec

ST173404LW

        Children see throughput for  1 initial writers  =   30251.11 KB/sec
        Children see throughput for  1 readers          =   28398.42 KB/sec
        Children see throughput for 1 random readers    =   14386.34 KB/sec
        Children see throughput for 1 random writers    =   17114.76 KB/sec

ST336607LC

These numbers are kind of screwed up. I find it hard to believe that a Seagate Cheetah 10k disk only gets this kind of performance. I am probably going to retire the machine that this disk is in, and find something a bit better.

        Children see throughput for  1 initial writers  =    4268.85 KB/sec
        Children see throughput for  1 readers          =    3454.83 KB/sec
        Children see throughput for 1 random readers    =    2762.78 KB/sec
        Children see throughput for 1 random writers    =    3499.16 KB/sec

ST380811AS

Some more unbelievable numbers. It wouldn't surprise me here if there was some major caching going on. The machine itself has 8gb of RAM in this situation.

        Children see throughput for  1 initial writers  =   20867.79 KB/sec
        Children see throughput for  1 readers          = 1616623.50 KB/sec
        Children see throughput for 1 random readers    = 1603349.50 KB/sec
        Children see throughput for 1 random writers    =    5807.17 KB/sec

Samsung

HD103UJ

iozone -s 4096m -r 2048k -i 0 -i 1 -i 2 -+n -t 1

	Children see throughput for  1 initial writers 	=  149834.62 KB/sec
	Parent sees throughput for  1 initial writers 	=  146610.63 KB/sec
	Min throughput per process 			=  149834.62 KB/sec 
	Max throughput per process 			=  149834.62 KB/sec
	Avg throughput per process 			=  149834.62 KB/sec
	Min xfer 					= 4194304.00 KB

	Children see throughput for  1 readers 		=  142497.44 KB/sec
	Parent sees throughput for  1 readers 		=  142448.43 KB/sec
	Min throughput per process 			=  142497.44 KB/sec 
	Max throughput per process 			=  142497.44 KB/sec
	Avg throughput per process 			=  142497.44 KB/sec
	Min xfer 					= 4194304.00 KB

	Children see throughput for 1 random readers 	=   84628.58 KB/sec
	Parent sees throughput for 1 random readers 	=   84611.25 KB/sec
	Min throughput per process 			=   84628.58 KB/sec 
	Max throughput per process 			=   84628.58 KB/sec
	Avg throughput per process 			=   84628.58 KB/sec
	Min xfer 					= 4194304.00 KB

	Children see throughput for 1 random writers 	=  103196.52 KB/sec
	Parent sees throughput for 1 random writers 	=  100444.03 KB/sec
	Min throughput per process 			=  103196.52 KB/sec 
	Max throughput per process 			=  103196.52 KB/sec
	Avg throughput per process 			=  103196.52 KB/sec
	Min xfer 					= 4194304.00 KB