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Achieving 6Gb/s with H700 controller with SATA 3 SSDs?
We are attempting some performance demonstration for the upcoming Super Computing 2011.
We have been trying to configure a PERC H700 to get 6 Gb/s performance with OCZ SATA 3 SSDs (Denava 2 and Vertex 3). The H700 controller technical guide shows(Table 6, on page 12) that SATA is only supported at 3 Gb/s. Therefore, we attempted to improve our performace by using an LSI SS9252 interposer to allow us to connect to the SAS interface. However the bios raid configuration menus show sata error on the bay containing the drive with the interposer.
Is there some to make this configuration work?
As a side note, connecting the SSD drives without the LSI SS9252 interposer we see that we are consistently saturating the SATA interface at 3 Gb/s.
skookum_job
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Posted June 20th, 2012 05:00
How far did you get with this? Perc H700 is behaving buggy for us with several SSD configurations... Right now it would be nice to get ANY SATA drive configured so it will even work.
ShoonMcgregor
4 Posts
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Posted June 20th, 2012 06:00
I ended up purchasing a the 1GB NV H700 with 8 Plextor M3S 256GB drives attached. The Perc configuration shows the line speed to be 6Gbps and I only see the disk access LED when the drives are in use. I over provisioned my raid volume but I don't know if that's necessary these days.
The bonnie++ tests were about 2% slower than what I had expected for my raid setup but I'm ok with that.
My host OS is ubuntu 12.04 (final release) and I've had no filesystem errors or any anomalous behavior so far.
ShoonMcgregor
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Posted November 26th, 2011 19:00
Have you tried the November H700 firmware with the bare sata ssd or the lsi interposer? I am looking to stand up a configuration very similar to this but I'm weary of the 3Gb/s limitation (and the persistent amber error on the drives.)