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Raid 5 (educate a newb)

post #1 of 2
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Is the best for protecting your data on a budget, when you have an SSD for games (i.e., all i need to read performance).

Everyone keeps saying that RAID isn't back up. Can you explain why? I know it doesn't protect against virus, or human errors, or things like electrical surges, etc. But, given my budget, I'd like to bite the bullet and just live with these risks. What I want to protect against is a hard drive failure say 12 months from now.

RAID 5 seems like the best ration. I'd be using WD Reds 3TBs.

What do you think?
Can I add drives to my array later on? Like buy 3 drives now and raid5 them, and then add a drive later and add it the array (3 working drives, 1 redundant)


Thanks.
    
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CPUMotherboardGraphicsRAM
Intel i5-4670K MSI Z87-G41 ASUS GTX 660 Corsair 8GB 
Hard DriveOptical DriveOSMonitor
9TB  None Windows 7 Dell U2713HM 
KeyboardPowerCaseMouse
Logitech K740 Seasonic G 550W Fractal Define R4 - Black with window Logitech M705 
Mouse PadAudio
Fellowes PlushTouch ASUS Xonar DGS with HD595s and Altec Lansing FX... 
  hide details  
Reply
post #2 of 2
First off, RAID 5 has a rather steep write penalty (due to the parity-bit calculation required for all writes). Is it the best for data security -- not really.
Consider getting one more WD Red and run RAID 10 (stripped and mirrored).
Consumer software RAID normally does not handle adding another HDD to an array, but usually provides for rebuilding the array when replacing a failed drive. Most hardware RAID cards allow you to add disks.
The Money Trap
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The Money Trap
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CPUMotherboardGraphicsRAM
i7-5820K ASUS X99-Deluxe 2 x EVGA GTX980 SLI 4 x 4GB Corsair Vengence DDR4 2400 
Hard DriveHard DriveHard DriveOptical Drive
Games = Crucial 256GB M4 SSD OS = Samsung 256GB 830 SSD Backup Western Digital HDDs  Samsung 223 
CoolingOSMonitorPower
Phanteks PH-TC-14PE  Win 7 x64 Ultimate  Dell U2412M 1920x1200 Antec TPQ 1200W 
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Cooler Master HAF 932 UPS: APC BackUPS XS1500 
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