Currently I am testing performance of a DSN-2100-10 DLink SAN. I have not used IOMeter before this however testing of this SAN has brought to light some interesting perfomance issues.
I have run IOMeter on our server drives and found the following:
Altos R720 Server
2 x Xeon 5130
Windows Server 20087 64bit
Physical Drive 0
RAID 1 (hardware on mother board)
2 x 72GB SAS drives
Physical Drive 1
RAID 5 (hardware on main board)
3 x 1TB SATA drives
Before anyone replies that I should be using a RAID addon card etc.. The performance of the C: is a LOT slower than I would expect (which in turn is causing poor results in my testing of the SAN performance)
IOMeter Test settings
Maximum Disk Size: 2500 Sectors
Transfer Request Size: 1MB
Percent of Access Specification: 100%
Percent Read/Write Distribution: 100% Read
Percent Random/Sequential Distribution: 100% Sequential
67GB (100%) Primary Partition on physical drive 0
Test results: approx 100MB/sec
500GB Primary Partition on physical drive 1
Test results: approx 270MB/sec
I have never used IOmeter before and never had to do any disk performance testing but it is concerning that expensive SAS drives in a RAID 1 configuration are being out performed by cheaper SATA drives in a RAID 5 configuration.
I am chasing any pointers / information on how to get the SAS drives returning the expected performance in the above configuration.