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RAID n00b

post #1 of 4
Thread Starter 
So I am COMPLETELY unfamiliar with RAID (as in how to do it)...and I've been building computer for 4-5 years now. Almost embarrassed to admit it. But it's cause I never tried.

I think I finally want to give it a shot but have a few questions first.

1- I heard RAID has a high failure rate. Part of the reason I never tried.
2- A lot of people say RAID's main purpose is speed but others tell me its for data safety. Confused.
post #2 of 4
Raid does not have a "higher failure rate". That is FALSE ( Raid 0 does statistically double your chances of a total failure vs. a single drive. )
And depending on what kind of Raid setup you choose to go with,, Will net you different results..

Raid 0 is when the data is spanned across both drives, then when read is thus read from both drives, Speeding up the process..

Raid 1 is when you have the data written in its full form to both drives. That way if one fails, you have the other..

Then there are ways to do Raid 0 and Raid 1 at the same time...
Read more info about that here..
post #3 of 4
There are a few different levels to RAID, each with their own functions.
Common consumer desktop RAID settings are RAID 0, and RAID 1.

RAID 0 stripes data across all disks in the array. Your data gets chopped up into 64-128K stripes and data is split between all of your array drives. This overcomes mechanical limitations of one drive, and increases your transfer speed as you can now read and write from two or more drives simultaneously. There is no redundancy with RAID 0, therefore if any member of the array were to fail, ALL of your data will be lost. The 'increased risk' is the same increase you have between running a single disk and two disks as far as failure rates are concerned. Capacity is the sum of all array members.

RAID 1 mirrors data across all disks in the array. Every disk will retain the exact same data. Therefore, if a disk in a RAID 1 array dies, you still have an exact mirror of your data on another drive, and can continue using your system like nothing happened (although you generally want to replace the failed drive ASAP). Capacity is the sum of one array member.

It really comes down to your requirements and protection/redundancy opinion as to which solution you would prefer. There are also other RAID modes such as RAID 5, which write parity data across all array disks. If one drive dies, it's possible to rebuild the data on this disk simply from parity caluclations. Implementations such as this generally are reccomended to have a dedicated RAID card, as parity calculations present a significant performance impact when writing data.
Waiting on X399
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Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
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Plantronics Gamecom 788 
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post #4 of 4
wow awesome info. Rep to you guys.
Wayne-The-Brain
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Wayne-The-Brain
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Hard DriveOptical DriveCoolingOS
OCZ 30GB SSD os /1tb 2x WD black Raid 0 Blu Ray Rasa 240 RX gentle typhoon push pull Windows 7 64bit 
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47 inch LG LCD 1080p Corsair ax850 gold Antec 300 Illusion (Modded) None 
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