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Help choosing RAID

post #1 of 50
Thread Starter 
Hey guys,

My friends have a company for 3D modeling and 3D creation, Pixar or w/e...dunno, i just know they do 3D ...they are buying new renderfarm nodes and they need the nodes plus the main node...They are searching for a cheap GOOD main node, with at least 2TB of HD. So we made this build:
-Gigabyte GA-EP35-DS3R P35
-OCZ S61EPS 610W
-Seagate ST3500641AS-RK Barracuda 500 GB SATA NCQ x 4
-Intel Pentium Dual Core E2160
-Corsair 2GB PC6400 800MHz 240-Pin

The thing is this, the HD for renderfarm nodes or at least the main one is recommended to be in RAID. Question is: which RAID is the best for that?

The function of the main node will be writting...every other node will send the final render to it, since the main node is where all the frames are going to be...so according to that...which RAID is better??
Thanks in advance
post #2 of 50
I would go with three 1TB 7200.11 Barracuda's set in a Raid 5. You get around 90-95% of the speed of a Raid 0 with the redundancy of a Raid 1.
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post #3 of 50
Thread Starter 
it would be more expensive... the 4-500gb barracuda's is cheaper...
post #4 of 50
4 500GB's would be cheaper, yeah. But if you put them in a Raid 0 then ALL data will be lost if just one HD goes out. Do you plan on backing up everything on a nightly/hourly basis?

If you put them in a Raid 5 then you'll have around 1.3 TB of space...not the 2TB you wanted.
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post #5 of 50
Dell Server.

The moment you start looking into something professional (outside of my / my friends home's) build it your self is not a good idea.

They (Dell) have warranties, technicians that can come out, etc..

Drop a blade server? Send it back, PSU fails and kills the HDD's, send them all back, get the replacements the next day.

You'll want several 500 gig, 750, or 1tb drives, depending on the hardware you select. Throw it into RAID 5 (capacity of the drives * number of drives minus 1).

Also, several tapes for backups of only the things that have been changed in the past week, two weeks, or month, depends what you decide.

Then have a NAS that you bring in every other time the tape backups are made. This should run a full backup of everything. It is a bit of a luxury item, because it is pricey, but should everything die, you can just restore the entire server, configurations and all. Though I strongly recommend this item.
    
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post #6 of 50
Quote:
Originally Posted by trueg50 View Post
Dell Server.

The moment you start looking into something professional (outside of my / my friends home's) build it your self is not a good idea.

The have warranties, technicians that can come out, etc..
Agreed.

Do the cost/benefit analysis of saving money building yourself vs the cost of 1-5 days downtime. For render farm, quad core is a must.
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post #7 of 50
Thread Starter 
Quote:
Originally Posted by trueg50 View Post
Dell Server.

The moment you start looking into something professional (outside of my / my friends home's) build it your self is not a good idea.

The have warranties, technicians that can come out, etc..
no budget for dell servers...plus the warranty is good in our country but not to die for...

4 500GB's in RAID 5 will be 1.3?...hmm what a problem...
post #8 of 50
Thread Starter 
What about RAID 0?? What's the percentage of failure it may have?
post #9 of 50
Quote:
Originally Posted by abe_joker View Post
no budget for dell servers...plus the warranty is good in our country but not to die for...

4 500GB's in RAID 5 will be 1.3?...hmm what a problem...
Unless you have a hardware RAID controller, don't do RAID5 without a hardware controller. With the onboard controller, it gives you read gains but writes are not great. RAID1 rebuild requires you to just drop in a new HD. RAID5 rebuilds requires the drive to be recalculated. Also, RAID5 eats CPU cycles.

It would also be better with 4 or 8GB of slower RAM than 2GB of faster RAM.
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post #10 of 50
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
Unless you have a hardware RAID controller, don't do RAID5 without a hardware controller. With the onboard controller, it gives you read gains but writes are not great. RAID1 rebuild requires you to just drop in a new HD. RAID5 rebuilds requires the drive to be recalculated. Also, RAID5 eats CPU cycles.

It would also be better with 4 or 8GB of slower RAM than 2GB of faster RAM.
ok, so RAID5 is not in question then...also remember it is a Main Node, not a server so 2GB is ok...i know is better 4GB or 8GB...
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