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Enabling RAID 5 in bios causes Windows 7 to crash during boot

post #1 of 9
Thread Starter 
I have a Gigabyte 890GX motherboard and just installed Windows on a new Samsung 840Evo.

Sata 3, AHCI,etc

Performance was lower than expected. I read someone else saying that by enabling RAID 5 in the motherboard bios (but not changing actual RAID settings), performance jumped on there Gigabyte motherboard.

I had previously set RAID 5 to disable. So, I enabled it.

And now Windows will not boot with it set.

Is there any logical reason for that? I can't figure it out.
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post #2 of 9
Quote:
Originally Posted by thebufenator View Post

Is there any logical reason for that? I can't figure it out.

You don't have a raid array and you have set Windows to boot from an array.

What's to figure out?

Try doing some reading here: RAID

And, in the future, I wouldn't be making BIOS changes I didn't understand.
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post #3 of 9
Thread Starter 
Yeah.....no

I have a RAID 10 array.

I enabled RAID 5 option in the bios. I did not create a RAID 5 array.

BIOS first boot device is still the SSD with Windows on it. Windows still attempts to boot. When it should go to the login screen it reboots.

Almost like someone switching from IDE -> AHCI in the BIOS.
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post #4 of 9
What drives do you have installed?
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post #5 of 9
Thread Starter 
I have a Samsung 840 Evo with Windows on it, and 4x WD EZEX drives in RAID 10.

Its a new install as of yesterday, new drives and all.

Doesn't really matter now as I just finished re-installing Windows with the RAID 5 support enabled.

Have yet to run some benchmarks yet to see if there is a difference.
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post #6 of 9
Quote:
Originally Posted by thebufenator View Post

I have a Samsung 840 Evo with Windows on it, and 4x WD EZEX drives in RAID 10.

Its a new install as of yesterday, new drives and all.

Doesn't really matter now as I just finished re-installing Windows with the RAID 5 support enabled.

Have yet to run some benchmarks yet to see if there is a difference.

Whew! Sorry for that first response. Thought you were a nOOb.

You seem to have things well in hand. Good luck on your speed search!
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post #7 of 9
Quote:
Originally Posted by thebufenator View Post

I have a Samsung 840 Evo with Windows on it, and 4x WD EZEX drives in RAID 10.

Its a new install as of yesterday, new drives and all.

Doesn't really matter now as I just finished re-installing Windows with the RAID 5 support enabled.

Have yet to run some benchmarks yet to see if there is a difference.

Installing Windows 7 with certain settings in BIOS (such as raid modes/AHCI support etc) disabled means that the necessary drivers are not installed during the OS install. Now that you've enabled them, the OS has detected they are enabled and installed the drivers during the fresh install.
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TudjBox.
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post #8 of 9
Thread Starter 
Well after running some benches, my Samsung Evo (with "RAID 5 support enabled" and RAPID) is showing Sequential reads around 800Mb/s, and writes around 1050MB/s. Looks like RAPID is working......

The 4K reads and writest are much much slower. This is using Crystal Disk Mark. 4K writes around 250MB/s, and reads are anywhere from 40-80MB/s

I am at work now, when i get home I'll post a screen shot.

I am running out of options to try now to figure out why the 4K speed are so slow.

In the bios, due to using a RAID 10 array for my WD10EZEX drives, Sata is set to RAID. AMD Sata ports 1-4 are used for RAID, and port 5(or 6....) is used for the OS drive. The non AMD Sata ports are used for my disc drives.

Sata 3 enabled. NCQ enabled. All the latest AMD RAID/AHCI drivers installed.

Only thing I haven't tried is disabling C&Q/C1E to see if the numbers change when the CPU stays at 3.6Ghz instead of 1100. I did notice during writes that the CPU stays at full speed, whereas during reads in CDM the cpu drops down to a 4x multiplier .
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FX-8320 M5A99FX Pro R2.0 Radeon 7870 4x4Gb Gskill 1600mhz 
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Samsung 840 Evo 500Gb 4x WD10EZEX RAID 10 TT Water 2.0 Extreme push/pull Corsair 500r 
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Desktop
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CPUMotherboardGraphicsRAM
FX-8320 M5A99FX Pro R2.0 Radeon 7870 4x4Gb Gskill 1600mhz 
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post #9 of 9
Thread Starter 


Notice the really crappy 4K speeds?

Any suggestions?
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Samsung 840 Evo 500Gb 4x WD10EZEX RAID 10 TT Water 2.0 Extreme push/pull Corsair 500r 
  hide details  
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Desktop
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CPUMotherboardGraphicsRAM
FX-8320 M5A99FX Pro R2.0 Radeon 7870 4x4Gb Gskill 1600mhz 
Hard DriveHard DriveCoolingCase
Samsung 840 Evo 500Gb 4x WD10EZEX RAID 10 TT Water 2.0 Extreme push/pull Corsair 500r 
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