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Old 07-29-09, 10:04 PM   #4
Tonacatecuhtli
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Join Date: Dec 2007
Posts: 15
Default Re: Linux nvraid 0+1 question

Well, I hate to answer my own question, but the answer is that NVRAID can't read from RAID 1 drives simultaneously. The problem is that hard drives have a hard time reading one sector, skipping the next X and reading the next sector without having to have the platter rotate all the way around again.

With RAID 0 each hard drive can read consecutively and by the nature of striping will read every Nth (how ever many drives) sector, this is what we want. If this were attempted with RAID 1, either the same data would be read from each drive, or a large amount of rotational latency would be introduced as the drives read small bits and tried to seek to the next block needed.

Hopefully that'll help in case anyone else has the same question in the future.
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