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SSD for OS & Raid 5 HDD for Data/Games

post #1 of 28
Thread Starter 
Hello all,

I searched the forums for this and found a similar thread, but wanted to confirm this was possible before I made any purchases. I'll be doing this to my sig rig FYI.

I have a 90GB OCZ Vertex that I would like to use for W7 and a Raid 5 setup with 3 Western Digitals 1 TB for all other data and games for the performance boost/redundancy. This should give me 2 TB of data?

Simple question: Is this possible?

Thanks to all in advance.
post #2 of 28
You should have no problems with that on your sig rig.
Hello Sandy :)
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Hello Sandy :)
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post #3 of 28
Yes, You only get 2TB out of the 3TB in the RAID 5 setup.
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post #4 of 28
Thread Starter 
Thanks, repped to both.
post #5 of 28
Yeah, but unless you have an IOP, your read speeds probably aren't going to be fantastic...

I'm in the same boat; might just be better to do RAID1+0 and spend the extra money on another TB drive to eliminate the need for parity processing.
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post #6 of 28
Thread Starter 
Not familiar with IOP....

I really need the redundancy though and I'm not too sure why the speed would be affected. Can anyone else elaborate?
post #7 of 28
What he means by iop is a dedicated parity processor (that you find on hardware raid controller)
raid 5 will consume some of your CPU cycles, which might be an issue while gaming. Raid 0+1 will be easier on your cpu.
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post #8 of 28
RAID5 works by using 1/nth of the disk space to store parity information, where n is the number of drives. That's why if you have 3 1TB drives, you only have 2TB of usable storage (1/3 of 3TB is reserved for parity)

Using some clever bit manipulation, you can essentially determine, if one drive were to die in a RAID5 setup, what data the missing drive had on it using the parity information. However, when read/writes are involved, you have to fiddle with the parity bit to determine the "actual data". This requires processing time, which unless you have a RAID card (or an IOP = I/O Processor), is done in software by the CPU. Not only is the CPU much slower than an IOP in real-world drive usage scenarios, but sucks up processing power for other tasks.

RAID1+0 is a mirror of striped drives. You lose 1/2 of your space, but you don't need to calculate parity since the RAID is just a mirror of two striped drives.

EDIT: Pictures. Really old chipsets, but you get the idea.

RAID 1+0:


RAID 5:

Edited by tylerstach - 6/8/11 at 9:03am
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post #9 of 28
Tyler you're not making things any simpler to understand.
Your second post deviates totally from your first and doesn't talk about the same problematic.
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Gaming Rig
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Huge NAS
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i7-2500k Asus P8P67 Pro EVGA GTX 770 SC ACX 16GB Vengeance DDR3-1600 CAS9 
Hard DriveOptical DriveOSMonitor
128GB C300, 5x1TB Raid 0 7 ultimate x64 2x Dell Ultrasharp U2410 
MonitorKeyboardPowerCase
Crossover 2730MD-P Logitech Illuminated Corsair TX 850 CM690 II Advanced 
MouseMouse Pad
Logitech MX518 Razer Goliathus 
CPUMotherboardRAMHard Drive
Intel Core-i3 2100T Asus P8H67-M Pro 4GB Corsair XMS3 1333 Crucial C300 
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post #10 of 28
Thread Starter 
My goal is redundancy and a little performance boost. I understand that in order to achieve redundancy that I am going to have to take a hit in speed and RAID 5 can give me both. I know RAID 0 is a pure speed boost, but then again I want redundancy first and foremost so that is out of the question for me.

With my current CPU and depending on a BD when it comes out (I'll have to sadly switch to i7, perhaps depending on its capability). How much of a performance hit will I take while gaming/programming/graphics editing with RAID 5? Will it lag?
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