Hello, Im new here, and I dont know much about storage, so my apologies in advance for the basic nature of these questions.  

I have Equallogic PS6100, RAID 6 accelerated, 85%7500rpm, 15%SSD.  We have about 10 volumes in the default pool, that are sized from the maximum 15tb.  

When we discuss maximum IOPS (Dell, or any other manufacturer), do they quote max IOPS per device, or per volume?

The topology is this:  Host running CentOS and a ISCSI initiator, with a converged network adapter (10g) <-> Dell N4064 10g switch <-> Dell equallogic PS6100 (10g controller cards).  

we notice that when we do process jobs on the linux host, we only get about 200 IOPS, 100mb/sec transfer rate, and average latency of 100ms.  Im guessing that latency is not good.  This process jobs are 100% read.  

I guess my concern is that in the experimental analysis, the MAX IOP rate is much higher, and so Im just wondering if this is due to things not being optimally setup? Maybe I just need to spread this data out over multiple volumes to get the expedited performance numbers?  

Thanks much for any and all help.