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Question about raid 10 with different sized hard drives


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#1 timreed1

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Posted 05 December 2013 - 07:11 PM

If I have 2x4tb hds and 4x2tb hds (listed Below). All of them are WD Black.
My question is can I have a raid 10 set up with 1x4tb and 2x2tb hard drives on each stripe and the other 1x4tb and 2x2tb on the mirrored side?

I am running my operating system (win 7 ult) on the ssd listed below with the motherboard also listed below. Nothing is stored on the OS drive that won't be on my raid drives with the redundant backup so I don't have to worry about that.

1 x SAMSUNG 840 Pro Series MZ-7PD256BW 2.5" 256GB SATA III MLC Internal Solid State Drive (SSD)

1 x ASUS SABERTOOTH 990FX R2.0 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard with UEFI BIOS

2 x Western Digital WD Black WD4001FAEX 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

4 x Western Digital WD Black WD2002FAEX 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive - OEM



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#2 timreed1

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Posted 06 December 2013 - 02:25 AM

My idea was that my two 4tb hard drives would be reduced to 2tb. I may be wrong but at this point who knows.

 

What if I had:

1 x Western Digital WD Black WD4001FAEX 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

5 x Western Digital WD Black WD2002FAEX 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

 

Would that work? would the one 4tb hard drive just be reduced to two?

If anyone could help I would greatly appreciate it. I am new to rain and am trying my best before I order anymore hard drives.



#3 Kilroy

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Posted 06 December 2013 - 10:25 AM

To tell you the truth I have no idea.  Normally when you set up RAID you use same size, if not identical, drives.  I would not recommend even attempting to set up RAID with the mix of drives you mention.  I'm thinking worst case where you get this set up and it works fine initially and then the drives start to fill up and the whole thing goes south and takes all of your data with it.



#4 timreed1

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Posted 07 December 2013 - 11:03 AM

I'm not new to building computers at all but I am new to RAID. I have no idea why I never looked into it but the features and redundancy of RAID is great. I am happy with the concept. Is it possible to set up a RAID 10 with the 4x2tb and a separate RAID 1 with the 2x4tb? I'm new to this so maybe there is even a tutorial on this that would help.



#5 waldojim42

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Posted 09 December 2013 - 02:02 AM

In most cases this is no. I have been through a few different RAID controllers, and never been allowed to do this. Using FreeNAS, you have considerably more flexibility. You can create multiple data pools, and then use one entire pool for redundancy, while using the larger, faster drives for the primary array.


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