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Valorous

Low IOPs using LSI adaptor even after firmware update!

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Hello everyone,

I'm getting low random read/write IOPs in between 50-60k (sata 2 speeds), as soon as I plug a SSD back into my motherboards SATA 3 ports I get the advertised speeds. However, Sequential read/write speeds are high across the board, only the IOPs are being affected by this adapter.

Specs:

http://www.ebay.com/itm/New-IT-Mode-LSI-9211-8i-SAS-SATA-8-port-PCI-E-6Gb-s-Controller-Card-/252344098349?hash=item3ac0e15e2d:g:-w4AAOSwGYVXAyCn&rmvSB=true3930k
GA UD5 x79
Samsung EVO 840/850, 256gb and 500gb
Samsung 840 PRO 500gb

I currently have the latest IT firmware installed (2118it.bin / v20.00.00.00) and the newest driver from 2015 (2.0.76.0) opposed to the initial 2009. However, I was told that this is a SAS 2.0 device and I will only get sata 2 speeds. This makes no sense to me, because my sequencial read/writes hover around 550mb, its only the IOPs that are low. Any idea what's going on? My IOPs went from max of 60k to 70k after firmware update, but I should still be getting 90k+

Running out of time to return this thing, my last idea could be that it should be in a PCI 3.0 or 2.0 slot, I've also set Windows power management to performance.

Thanks!

Edited by Valorous

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On 7/12/2016 at 10:14 AM, Brian said:

What drive is it? You listed a few...and how are you testing?

Any drive that's hooked up to the LSI.  All drives perform normally when in sata 3 ports.  I only have 2 on this x79 motherboard, sata3 makes a big difference with my type of work.

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Intel SATA chipsets generally perform much better in single drive situations than the LSI HBAs. Those numbers you are seeing look pretty normal. You'll notice more with higher loads or additional drives.

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Hi, I am new here but I have a lil' experience with what you're doing. With 850 pro's I found little up-scaling via raid 0 in windows raid. So I bought my Avago 3108 card. It's actually a supercharged LSI 9361-8i built for Supermicro.

Are you using the LSI manger software?

What I found is that if I create 2 virtual disk's - one with the SSD's and one with the HDD's on the same channel and install the OS to this, it performs drastically better- I don't know why. I can show you what my numbers are if you like. Kind  of Hybrid array, but works really well.

Using this information I installed the above HDD's on the HP 410i controller and got very good results as well.

So the LSi card is now running 6 15k.7 Cheetah drives and they are very fast.

edit: opps didn't catch this, You do know that SAS drives are very different then SATA drives - correct? That card also requires an 8x slot. Also how are you connection the HDD's to the raid card?

Edited by kodi41

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