There is an EMC NC 960 SAN to which a Unix server is attached.  The SAN performance seems to be poor to be but the SAN administrator says that it is running as it should.  Below is an output of iostat from the Unix server please let me know what you think.

The system is showing 4.61% waiting for disk i/o when 9,909 blocks are written.

Linux 2.6.18-164.el5PAE (d9v21pimdb1)   03/21/2012

avg-cpu:  %user   %nice %system %iowait  %steal   %idle

           1.26    0.00    1.96    4.61    0.00   92.17

Device	tps	Blk_read/s	Blk_wrtn/s	Blk_read	Blk_wrtn
sda	1.98	0.00	0.00	0	0
sda1	0.00	0.00	0.00	0	0
sda2	0.00	0.00	0.00	0	0
sda3	0.00	0.00	0.00	0	0
sda4	0.00	0.00	0.00	0	0
sda5	1.98	0.00	0.00	0	0
sdb	0.00	0.00	0.00	0	0
sdb1	0.00	0.00	0.00	0	0
sdb2	0.00	0.00	0.00	0	0
sdc	0.00	0.00	0.00	0	0
sdc1	0.00	0.00	0.00	0	0
sdd	0.00	0.00	0.00	0	0
sdd1	0.00	0.00	0.00	0	0
sdd2	0.00	0.00	0.00	0	0
sde	0.00	0.00	0.00	0	0
sde1	0.00	0.00	0.00	0	0
sdf	0.00	0.00	0.00	0	0
sdf1	0.00	0.00	0.00	0	0
sdf2	0.00	0.00	0.00	0	0
sdg	0.00	0.00	0.00	0	0
sdg1	0.00	0.00	0.00	0	0
sdh	0.00	0.00	0.00	0	0
sdh1	0.00	0.00	0.00	0	0
sdh2	0.00	0.00	0.00	0	0
sdi	0.00	0.00	0.00	0	0
sdi1	0.00	0.00	0.00	0	0
dm-0	0.00	0.00	0.00	0	0
dm-1	0.00	0.00	0.00	0	0
dm-2	0.00	0.00	0.00	0	0
dm-3	8.91	0.00	71.29	0	72
dm-4	0.00	0.00	0.00	0	0
dm-5	0.00	0.00	0.00	0	0
dm-6	0.00	0.00	0.00	0	0
dm-7	0.00	0.00	0.00	0	0
dm-8	0.00	0.00	0.00	0	0
dm-9	0.00	0.00	0.00	0	0
dm-10	0.00	0.00	0.00	0	0
emcpowera	248.51	0.00	2035.64	0	2056
emcpowera1	0.00	0.00	0.00	0	0
emcpowera2	248.51	0.00	2035.64	0	2056
emcpowerb	720.79	0.00	7786.14	0	7864

emcpowerb1	720.79	0.00	7786.14	0	7864
dm-11	1238.61	0.00	9908.91	0	10008