I have been doing a bit of testing recently with the LSI SAS 2008 based controllers such as the 9211-8i in RAID 0 with various SSDs. Recently I took eight 64GB ADATA S599 Sandforce based SSDs and placed them in RAID 0 on the LSI 9211-8i. I was expecting maximum transfer rates in excess of 2GB/s in ATTO. What I saw instead was a performance anomaly.
One recent contact form question was regarding the alleged 660MB/s limitation on the Intel ICH10R chipset (also known as the 82801JR I/O controller), especially in conjunction with X58 based chipsets which currently represent the big iron of Intel’s lineup until the LGA 2011 parts come out in Q3 or Q4 2011. When the ICH10R was released in 2008, there was little need for more than 660MB/s as SSDs were still not hitting the SATA II bandwidth caps. When platter drives peaked around 120MB/s having a six port (one likely occupied by an optical drive) that could put out 660MB/s was fine. In 2010, 660MB/s is barely more than two ~$100 SSDs can put out. With all of that being said, I [...]
Recently, I updated the benchmark numbers on this site to include an Intel X25-M G2 80GB but alluded to having two drives free. Instead of doing a “standard” X25-M G2 80GB in RAID 0 piece, I decided to look at something I get asked quite often, Intel ICH10R/ ICH9R RAID 0 or Windows Software RAID 0 (stripe) for SSDs. To compare the X25-M G2 80GB numbers below with the Indilinx and Intel X25-V 40GB numbers found on this site, one should use the ICH10R numbers contained within.
The question of whether or not one can mix 7,200rpm hard drives with 5,400rpm (5,900rpm or other speed) “green” drives in RAID is one that I get asked constantly. My general advice is to not do it. While testing the Supermicro X8SI6-F and Supermicro X8SIL-F with a LSI 9211-8i (essentially making the setups very similar) I ran some Windows ATTO benchmarks which is a pretty decent benchmark for testing best case throughput.