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In place upgrade of RAID1 to RAID5

post #1 of 32
Thread Starter 
Hi,

I'm planning on getting another 2TB WD Green drive to add to my sig rig. Currently, I have 2x 2TB WD Green Drives in a RAID1 array that stores my data. The problem now is that I want to be able to do and in place upgrade from a RAID1 system to a RAID5 system.

Is this possible using the current hardware I have? BTW, this is a hardware RAID.

Loads of REP await...
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post #2 of 32
What raid card are you using? Is it an addon card, or the raid controller on the mobo?

You need to check if your raid controller supports "Online RAID Level Migration (OLRM)"
post #3 of 32
i looked up your motherboard and it indicates it does 0/1/5/10, so i would assume all of this is done through your mobo and not an actual card??
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post #4 of 32
Thread Starter 
Quote:
Originally Posted by graphicsman View Post
i looked up your motherboard and it indicates it does 0/1/5/10, so i would assume all of this is done through your mobo and not an actual card??
Yea, you are correct. I'm running raid via my mobo, and not a dedicated card
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post #5 of 32
FYI, ive seen many threads on here about people mentioning that the WD green drives dropping while in RAID due to the power saving features.
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post #6 of 32
To be honest...I don't even know if an in-place upgrade is possible without losing your current data (I'm thinking you're talking about just switching your RAID-1 to a RAID-5 by adding the additional hard drives). Reason being that RAID-1 is directed to mirroring all drives in the array while RAID-5 is striping with parity. In general though...I'd stay away from doing anything besides RAID-0 and RAID-1 on the motherboard's controller as any advance RAID should be used with a dedicated card in my opinion. To go about doing this you would have to backup your RAID-1, create the new RAID-5 array after getting the new WD Green drives (you'll lose your current RAID-1 after replacing it with the RAID-5), and finally re-copy the backed up data to the new RAID-5 array. If you want more information you should check out DuckieHo's post 'PERC 5/i RAID Card: Tips and Benchmarks' thread.
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愛(Ai)
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post #7 of 32
Thread Starter 
Quote:
Originally Posted by pvp309rcp View Post
To be honest...I don't even know if an in-place upgrade is possible without losing your current data (I'm thinking you're talking about just switching your RAID-1 to a RAID-5 by adding the additional hard drives). Reason being that RAID-1 is directed to mirroring all drives in the array while RAID-5 is striping with parity. In general though...I'd stay away from doing anything besides RAID-0 and RAID-1 on the motherboard's controller as any advance RAID should be used with a dedicated card in my opinion. To go about doing this you would have to backup your RAID-1, create the new RAID-5 array after getting the new WD Green drives (you'll lose your current RAID-1 after replacing it with the RAID-5), and finally re-copy the backed up data to the new RAID-5 array. If you want more information you should check out DuckieHo's post 'PERC 5/i RAID Card: Tips and Benchmarks' thread.
Any reason why using the built-in raid controller us bad for raid 5? I just don't want to have to dish out more cash if it's not necessary.
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Icarus
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post #8 of 32
Quote:
Originally Posted by shinigamibob View Post
Any reason why using the built-in raid controller us bad for raid 5? I just don't want to have to dish out more cash if it's not necessary.
There's just a possibility of running into some performance issues as a motherboard's controller relies on your CPU while a dedicated card has one built in as well as memory cache if I remember correctly. I've personally never tried it since I needed many more SATA ports than what my motherboard had to provide. Since I wanted the best performance possible...I went ahead and researched on the best controller that could fit my needs and funds. Building array(s) cost a lot...so you should be prepared to spend when you go that route. My whole RAID and controller setup seems to cost the same or much more than my PSU, CPU, MB, RAM, and GPUs...combined .
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愛(Ai)
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post #9 of 32
Thread Starter 
Quote:
Originally Posted by pvp309rcp View Post
There's just a possibility of running into some performance issues as a motherboard's controller relies on your CPU while a dedicated card has one built in as well as memory cache if I remember correctly. I've personally never tried it since I needed many more SATA ports than what my motherboard had to provide. Since I wanted the best performance possible...I went ahead and researched on the best controller that could fit my needs and funds. Building array(s) cost a lot...so you should be prepared to spend when you go that route. My whole RAID and controller setup seems to cost the same or much more than my PSU, CPU, MB, RAM, and GPUs...combined .
Thanks for the info. Roughly how much would a dedicated controller cost, if I'm not aiming for the highest of high end? I'm thinking more along mid-range, but leaning towards high-end.

Also, what are some good brands, models, etc, to look for when buying a controller?
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Icarus
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post #10 of 32
Currently I'm using an HP p400i with 512MB of ram

http://www.provantage.com/hewlett-pa...1~7HPP93LC.htm

I would consider this higher end.
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