HP SA P410i counters

With "noop" option enabled in the I/O scheduler:
[root@srv sandbox]# echo "noop" > /sys/block/cciss\!c0d0/queue/scheduler

With 8MB of read ahead cache:
[root@srv sandbox]# blockdev --setra 8192 /dev/cciss/c0d0

[root@srv sandbox]# iozone -i 0 -i 1 -i 2 -r 4m -e -t 3 -s 48g
	Iozone: Performance Test of File I/O
	        Version $Revision: 3.327 $
		Compiled for 64 bit mode.
		Build: linux

	Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
	             Al Slater, Scott Rhine, Mike Wisner, Ken Goss
	             Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
	             Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
	             Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy,
	             Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root.

	Run began: Thu Nov 18 10:42:48 2010

	Record Size 4096 KB
	Include fsync in write timing
	File size set to 50331648 KB
	Command line used: iozone -i 0 -i 1 -i 2 -r 4m -e -t 3 -s 48g
	Output is in Kbytes/sec
	Time Resolution = 0.000001 seconds.
	Processor cache size set to 1024 Kbytes.
	Processor cache line size set to 32 bytes.
	File stride size set to 17 * record size.
	Throughput test with 3 processes
	Each process writes a 50331648 Kbyte file in 4096 Kbyte records

	Children see throughput for  3 initial writers 	=  403348.45 KB/sec
	Parent sees throughput for  3 initial writers 	=  396017.75 KB/sec
	Min throughput per process 			=  130588.26 KB/sec
	Max throughput per process 			=  136556.31 KB/sec
	Avg throughput per process 			=  134449.48 KB/sec
	Min xfer 					= 48132096.00 KB

	Children see throughput for  3 rewriters 	=  388516.96 KB/sec
	Parent sees throughput for  3 rewriters 	=  383248.16 KB/sec
	Min throughput per process 			=  127749.85 KB/sec
	Max throughput per process 			=  132657.72 KB/sec
	Avg throughput per process 			=  129505.65 KB/sec
	Min xfer 					= 50331648.00 KB

	Children see throughput for  3 readers 		=  303065.75 KB/sec
	Parent sees throughput for  3 readers 		=  303053.32 KB/sec
	Min throughput per process 			=  100007.34 KB/sec
	Max throughput per process 			=  102066.11 KB/sec
	Avg throughput per process 			=  101021.92 KB/sec
	Min xfer 					= 49319936.00 KB

	Children see throughput for 3 re-readers 	=  298324.72 KB/sec
	Parent sees throughput for 3 re-readers 	=  298310.37 KB/sec
	Min throughput per process 			=   98019.91 KB/sec
	Max throughput per process 			=  100545.94 KB/sec
	Avg throughput per process 			=   99441.57 KB/sec
	Min xfer 					= 49070080.00 KB

	Children see throughput for 3 random readers 	=  168330.78 KB/sec
	Parent sees throughput for 3 random readers 	=  168326.31 KB/sec
	Min throughput per process 			=   55925.84 KB/sec
	Max throughput per process 			=   56208.99 KB/sec
	Avg throughput per process 			=   56110.26 KB/sec
	Min xfer 					= 50081792.00 KB

	Children see throughput for 3 random writers 	=  301058.52 KB/sec
	Parent sees throughput for 3 random writers 	=  297864.71 KB/sec
	Min throughput per process 			=   99511.12 KB/sec
	Max throughput per process 			=  101287.23 KB/sec
	Avg throughput per process 			=  100352.84 KB/sec
	Min xfer 					= 49451008.00 KB



iozone test complete.
[root@srv sandbox]#