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Need advice

post #1 of 8
Thread Starter 
Hi, will I be able to hardware raid 0 4 250gb drives and then software raid 0 the 1tb hardware raid and another 1tb drive. This is the only way to use all 5 drives maximum storage. Will it work and if so how well will it work?
post #2 of 8
It will work, remember that raid-0 is only as good as its weakest link (in most cases), so the whole thing will be limited by the single drive in the second raid 0.

give this a read. http://www.servethehome.com/mixing-7200rpm-5400rpm-green-drives-raid-0/
Quote:
This, of course was using RAID 0 array which is completely impractical for a 14-16 drive setup in all but the most extreme conditions since the risk of data loss is so high. I do think that it shows a clear preference for sticking with 7,200rpm drives for a performance oriented array. There is a clear performance loss with the additional two WD Green drives in the RAID 0 array
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post #3 of 8
Thread Starter 
So your saying that as long as the fist raid comes to 1tb and the second raid is 1tb I'll get 2tb or are you saying the second raid will be affected by a single drive in the first raid so it'll come to 1250gb?
post #4 of 8
I am saying that the first raid-0 of 4 drives will be limited in terms of speed by the second single drive in the nested raid-0.
You would be better of just sticking with 1 raid 0 of 4 drives in terms of performance.

It really depends on what it is that you are trying to achieve. If it is drive pooling (Mixing all space into one big lump) I would look at putting all of the drives in JBOD and using software designed for that purpose. If it is extreme performance, at the expense if high risk of losing data, then a single raid 0 of 4 drives is your best best.

Nesting a second raid 0 with the VD Raid0 of 4, with another drive will limit the write speed performance of the 4 drive raid to that of a single drive essentially, defeating the purpose of the first raid.
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post #5 of 8
Thread Starter 
speed or high risk isn't going to matter, just the size, basically i have 4 250gb hardrives and 1 1tb harddrive, the only way i can think of to get all 2tb out of them is to raid 0 the 4 250gb harddrives on a raid controller and then raid 0 the raid controller and the 1tb hardrive through software.
post #6 of 8
In that case the solution you suggested will work as you expect it to:thumb:
Another option if you are using linux, is to use LVM to pool the drives together. Add all of the Physical Drives into the LVM pool. Then create 1 volume group with 1 logical_volume at max size. This may give you higher speeds at about the same risk level, but its up to you really. It all comes down to your specific setup.smile.gif
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Felix
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post #7 of 8
Thread Starter 
Thanks for the confirmation that it'll work, I'm not a Linux guy (more mac and windows for my server) I also have enother question not really relating to this but, would you know how I can access my server from school computers over the Internet from windows server 2008?
post #8 of 8
Hmm, there are a couple of ways. Bit for that I would post another thread in either the Servers or Network section here as it will likely get more attention. For Windows server 2008 (R2) tycoonbob seems to be the prevailing guru here. I am a linux person myself so can't offer many good options.
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Felix
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ESXi 1
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Intel 520 Series SATA3 25nm 120G 2.5' Scythe Kozuti CPU low profile heatsink fan Microsoft Windows 8 Pro w/ Media Centre Corsair Vengeance K90. Performance, MMO, Mechan... 
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Dell 19V 4.62A (Round) PA-10 Original AC Adapter Antec ISK110 VESA Mini-ITX Case, 90-watt adapte... Corsair Vengeance M90. Performance, MMO, Mechan... 
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SanDisk Blade 4GB Scythe Big Shuriken Rev. 2 ESXi vSphere 5.1 Coolermaster Elite 343 MATX Mini Tower Case Bla... 
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Dell X3959 dual port Intel GbE NIC 
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