Setting up RAID

What sort of drives can be used with RAID? Are there any potential problems with striping two drives or different sizes? How about mirroring 2 drives of the same capacity but different specs (brand/speed/etc)?
RAID can be utilized with PATA, SATA, P-SCSI, SAS and Fibre Channel ( FC) drives.

For the second part of your question, the answer is "yes". All RAID functions specify using identical drives. Striping...

different size drives lowers the performance to the lowest common denominator. Larger drives will have a higher average seek time (assuming same rotational speed.) Although what you suggest is doable, most will not recommend it or support it.

And, for the final part of your question, response performance of the first drive will be negatively affected by the lower speed second drive. Again it's doable, but most will not recommend or support this. You are opening yourself up to errors as well. You are better off using asynchronous mirroring between arrays where the second array has lower cost and speed drives.

This was first published in November 2005
This Content Component encountered an error



Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.



Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: