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  #1  
Old 05-14-2011, 08:42 AM
Pietato Pietato is offline
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Default A question for the incredibly nerdy

Say I have three hard disks and want to use them as one logical drive. What RAID level will allow my to do this?

I would also like to avoid this if possible; If one drive fails I don't want 100% data loss similar to RAID 0

more or less if 1 disk fails only the data on that disk is lost
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Old 05-14-2011, 09:16 AM
FireRanger FireRanger is offline
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Default Re: A question for the incredibly nerdy

Any of them will work with three discs.

I'm a fan of RAID 1 since it is mirroring rather than striping and works with only two disks (cheap). As long as at least one disk is working, you lose no data. So if you put all three discs in a RAID 1 array, and you light two of them on fire, the system will still operate on the one remaining disc, you won't even notice it other than the warning messages (and smoke).

RAID 5 would give you performance and redundancy. You can lose ONE disk in a RAID 5 array. The system will continue to operate with reduced performance. When you replace the failed disk, it will automatically rebuild and return to normal operation. If you lose two disks, the entire array is toast.

The last file server I built had two RAID 1 arrays in it, with two disks each. One array had the OS, software, etc (C-Drive). The other other array was for storage ("M-Drive"). So, the OS doing shit didn't bog down file access. And the file access didn't bog down the OS doing shit. And if the OS, being windows, decided to shit itself, it wouldn't take the file storage with it. And both had redundant drives so you could lose one drive in each array and still be operational. This proved itself to be worthwhile. They've been through two or three drives since then without a single moment of downtime and no lost data.
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Last edited by FireRanger; 05-14-2011 at 09:19 AM.
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Old 05-14-2011, 02:00 PM
Pietato Pietato is offline
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Default Re: A question for the incredibly nerdy

I had a feeling that RAID 5 was going to be my answer. Thanks alot. Im probably leaning to linux to do this setup as it has good LVM support as well. Glad to see I'm not the only nerd on here!
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Old 05-14-2011, 02:56 PM
FireRanger FireRanger is offline
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Default Re: A question for the incredibly nerdy

Geeks unite! And conquer! with... redundant arrays of independent disks!!
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Old 05-14-2011, 02:59 PM
DiabloBlanco DiabloBlanco is offline
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Default Re: A question for the incredibly nerdy

I must learn the ways of your culture.
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Old 05-14-2011, 10:13 PM
trcothorn trcothorn is offline
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Default Re: A question for the incredibly nerdy

i clicked this thread thinking i might be able to help but i have no idea what yall are talking about
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Old 05-15-2011, 04:58 AM
FireRanger FireRanger is offline
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Default Re: A question for the incredibly nerdy

Hahaha. Basically, with a RAID controller, you can connect multiple hard drives together into an array that is recognized as one big drive. Depending on what "style" array you use determines the benefits you get including redundancy if a disc crashes and increased read/write speed.
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How to: Aux light wiring, relays, & fuses
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Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
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Old 05-15-2011, 05:57 AM
Pietato Pietato is offline
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Default Re: A question for the incredibly nerdy

I should mention that I work for ATTO Technology. A company that makes high end storage/RAID controllers and probably should have known the answer to this. But hey im just a tech i dont design any of that crap just fix it on the hardware side lol


I just think its sorta ironic that a work for a company like this but still dont know that much about it
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Old 05-15-2011, 07:09 AM
mickblock mickblock is offline
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Default Re: A question for the incredibly nerdy

Well I work at Chicago Assembly as an online repairman but I still couldn't always tell you why your car is overheating.
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Old 05-15-2011, 07:30 AM
FireRanger FireRanger is offline
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Default Re: A question for the incredibly nerdy

I used to work at a hospital. But I wouldn't let me do open heart surgery.
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How to: Aux light wiring, relays, & fuses
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How To: NO HEAT Troubleshooting Guide
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