Slow Performance from Samsung 840 Pro 512GB SSD's in RAID 1


I have been having some seriously slow performance since I had my system drive changed to be 2 Samsung 840 Pro 512GB SSD's in RAID 1. Software opens slowly, applications hang, and overall processing is slow.

When I first changed from my RAID 1 HDD's to the SSD's, I was getting very frequent BSOD's. Our IT department determined that there was a problem with the SATA controller and my board was replaced. We also disabled TRIM after reading a few posts talking about RAIDED SSD's and what chipsets it works with. So now, no more BSOD's but very slow performance. My system specs are as follows:

System Drive:
- 2x512GB Samsung 840 PRO SSD’s set up in RAID 1

Data Storage Drive
- 2x300GB HP HDD's set up in RAID 1

OS Name Microsoft Windows 7 Professional
Version 6.1.7600 Build 7600

System Manufacturer Hewlett-Packard
System Model HP Z800 Workstation
System Type x64-based PC
Processor Intel(R) Xeon(R) CPU E5645 @ 2.40GHz, 2395 Mhz, 6 Core(s), 6 Logical Processor(s)
BIOS Version/Date Hewlett-Packard 786G5 v03.20, 6/10/2011
SMBIOS Version 2.6
Hardware Abstraction Layer Version = "6.1.7600.16385"

Installed Physical Memory (RAM) 24.0 GB
- 6 x 4GB Kingston 1333MHz/PC3-10600E unbuffered ECC RAM
Total Virtual Memory 48.0 GB
Page File Space 24.0 GB

Intel 5520/5500/X58 Chipset
Intel Desktop/Workstation/Server Express Chipset SATA RAID Controller
LSI Adapter, SAS3000 series, 8-port with 1068E

We have a few Ideas but are not sure what the solution is. Should we try formatting and reinstalling Windows to try to flush out any software issues? Or could it be that the SSD's don't like to run in RAID 1? if so could turning the RAID off be the solution?

My other concern is that the various hardware components in this system really don't agree with each other. If this is the case, can anyone suggest a possible hardware upgrade that can solve my issue?

I would really appreciate any suggestions, I'm not a hardware guy and I think I've learned about all I can about the subject in the past couple months dealing with this problem!


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More about slow performance samsung 840 pro 512gb ssd raid
  1. Why RAID 1 for the Samsung 840 Pros? They are some of the most reliable drives available on the market and, as long as you have a good regular backup solution in place, there shouldn't be much need for RAID 1.

    I would try either cloning your current installation or a completely fresh installation of Windows on one non-RAID drive.

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