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Question Various RAIDs performance versus a single drive

A

a Michael

Junior Member
I am curious as to how a single drive, say a 10k SAS2 drive performs in comparison to a 3 drive RAID 5 and a 4 drive RAID6. I am only concerned with these RAID levels; I understand the idea of RAID 50 and 60. I am looking to purchase some 10k SAS2 drives for my LSI 9260i8 and want to build a RAID for my storage drives but along the way I want to try a few configurations. I understand the basic benefits and drawbacks to all of these RAID levels but performance is always mentioned in a round-about generic way. For reference sake, let us use the HGST HUC101212CSS600 as this is a 1.2TB drive that I am really leaning towards. Is the RAID 6 performance that much worse than a RAID 5. And oh yes, I am aware of the severe pitfalls of RAID 5. But the performance of a RAID 6 is often mentioned somewhat fuzzily. Thanks for any light that you can shed. Oh, my capacity needs are modest at the moment; it is performance I am curious about and some day I will get to a RAID 50 or 60 (which seems quite desirable).
Thanks for any illumination that you can provide.
 
Thank you for your reply. It appears to be an interesting article and I shall read it soon.
The answer as to my interests is: Yes I do want to trip with RAID setups on my way to a decent performing (much better than single disk for sure) while having some decent data integrity without wasting too much space. This is probably everyone's goal, huh?
I am thinking of getting 4 drives (plus one for a replacement) and starting with a simple 2 drive RAID and then converting it to another and then another RAID where possible (other than wiping and re-starting clean) to get an idea how this all really plays out. And then I shall see from there if I need or desire to go further, as I am attracted to the idea of a RAID 60 and there is also the RAID 10. I also know I have to try a RAID 5 just to see; as when I entered into this idea that is the RAID that had always appealed to me. I think I know better now but I just have got to see how it performs and acts.
I know that, just like installing an OS, a clean install is preferable and that is what I have done for most of my computer life (25 plus years). But part of the appeal is also the slothly migration and the slothly rebuild. Hey, Windows 3.1 and those 7 floppies! Ah, that tantalizing anticipation fueled by that weird insistent floppy noise (hey, beats a 56k modem). Or re-installing any modern Windows and those 200 plus updates. Geez!
Thanks again for your help, I appreciate it; and I will post my reactions soon.
 
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