How Complicated Can the MacPro's Software RAID Get?

[Benjamindaines]

Say I have 4 500GB hard drives, and I want two of them to be set up as a RAID 0 array to create 1TB. I want to do the same with the other 2 500GB drives (creating 2 1TB drives), but then I want to set these 1TB drives up in a RAID 1 array. Can that be done with the software RAID?

 

[Thiol]

Say I have 4 500GB hard drives, and I want two of them to be set up as a RAID 0 array to create 1TB. I want to do the same with the other 2 500GB drives (creating 2 1TB drives), but then I want to set these 1TB drives up in a RAID 1 array. Can that be done with the software RAID?

Yes, the software RAID can do 0+1. Here is an example from Apple.

http://docs.info.apple.com/article.html?artnum=304377

 

[Umbongo]

You should use RAID 10 over RAID 0+1 as it offers superior redundancy.

from wikipedia:

* RAID 0+1: striped sets in a mirrored set. The key difference from RAID 1+0 is that RAID 0+1 creates a second striped set to mirror a primary striped set. The array continues to operate with one or more drives failed in the same mirror set, but if drives fail on both sides of the mirror the data on the RAID system is lost.

* RAID 1+0: mirrored sets in a striped set. The key difference from RAID 0+1 is that RAID 1+0 creates a striped set from a series of mirrored drives. In a failed disk situation RAID 1+0 performs better because all the remaining disks continue to be used. The array can sustain multiple drive losses so long as no mirror loses both its drives.

 

[Thiol]

You should use RAID 10 over RAID 0+1 as it offers superior redundancy.

from wikipedia:

Oops, you're right. My mistake. Always do 1+0 instead of 0+1.

 

[Julien]

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