Win 7 and Intel IMSM 8.9 beware!

T

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[H]ard DCOTM January 2026
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there's a bug in Intel Matrix Storage Manager 8.9 on Win 7 with many users reporting HDD problems. My RAID 1 array had both go offline while I was at work and could not be accessed by either OS (I dual boot XP Pro and Win 7 Pro). I had to make 1 HDD a non-RAID member from the RAID setup screen in BIOS to restore functionality and then rebuilt the array after that. Intel is "aware of the issue" and recommends going back to version 8.8 of IMSM even though 8.9 is listed as the Win 7 supported version. Judging by the ASUS forums ( I've got Maximus Formula mobo ) many users were affected by this bug with degraded arrays and HDD's which later check out fine. Needless to say IMSM 8.9 is no longer on my Win 7 installation. Beware IMSM 8.9 ! I'd also like to add that an email to Intel support was replied to inside of 24 hrs and helped me find the solution very quickly.
 
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I guess I've been lucky, been running 8.9 since August with no problems, first on Win7 x64 RTM and then retail version. Using Gigabyte P45 based motherboard w/ two 1TB WD Green drives in RAID1.
 
I used to get instant BSOD if I tried to install the regular intel matrix storage manager. I switched to the Rapid Storage Technology driver 9.5.0.1037 from station drivers and it's been running very stable on win7 on my asus p6t deluxe.
 
Is there any real need to install those when using AHCI? And what would it give me? I'm doing AHCI currently on my system, I'm about to get an SSD and do a fresh install on that, was wondering if I should install the drivers, I'll be sticking with AHCI.
 
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