OCZ Vertex 3 Pro Preview: The First SF-2500 SSD
by Anand Lal Shimpi on February 17, 2011 3:01 AM ESTAS-SSD High Queue Depth Incompressible Sequential Performance
While ATTO shows us best case scenario for the SF-2500, AS-SSD shows us the worst case - at least for writes. The AS-SSD sequential benchmark takes place at a very high queue depth of 32 and uses incompressible data for all of its transfers. The result is a pretty big reduction in sequential write speed on SandForce based controllers.
Read speed is minimally impacted by the nature of the data. We see that at high queue depths over a 6Gbps SATA interface the Vertex 3 Pro can break 500MB/s for sequential reads. Over a 3Gbps interface the Vertex 3 Pro is mostly unimpressive, looking a lot like a C300.
The sequential write test is a tough pill to swallow for SandForce. This is truly worst case scenario performance as its high queue depth transfers of incompressible data. Admittedly the Vertex 3 Pro does much better than drives based on its former controller (SF-1200) but it's no faster than Samsung's SSD 470 and barely faster than the SSDNow V100. Over a 3Gbps interface the controller doesn't look all that great either. This is an important chart to look at if you're doing a lot of file archival on your SSD. However most usage models will see a very different performance breakdown than this. For SandForce, this is truly the worst case scenario.
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Aitam - Monday, February 21, 2011 - link
I know it would bring the load to the CPU rather than the controller, but I wonder if using it on other drives could bring similar results in terms of increased speed or reduced writing overhead...bhougha10 - Wednesday, February 23, 2011 - link
Ok, Anand, enough is enough. I know you know when the G3 is going to be here. Please spill it. Do I want to wait any longer, or is it futile?MarcHFR - Thursday, February 24, 2011 - link
Dear all, Dear Anand,I think it's important to note that AnandTech Storage Bench, like PC Mark Vantage HDD, represent a "best case" for SandForce based SSD.
These benchmarks are based on logs which have recorded accesses to be repeated, but not the data contained in these accesses. These means that the data used in the benchmark may well be highly compressible, which isn’t necessarily the case in real usage.
Hrel - Saturday, March 12, 2011 - link
500 bucks for a 100GB drive?! Are you FUCKING KIDDING ME?!that's LITERALLY 10 times more expensive than it's worth...
I simply do not understand this; who besides Bill Gates and Warren Buffet would buy this crap? No I take that back, both those guys are smart enough to turn down such an offensive value proposition. So I repeat, WHO WOULD BUY THIS?!