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Unanswered: Sequential I/O with RAID-5 and RAID-10
This is not really a DB2 question, but I hope someone could help clarify this for me. On p.18 of the following presentation ( http://www.wmduszyk.com/wp-content/u...n_Nasypany.pdf ), it's mentioned:
"N disk RAID 5 arrays can handle no more than N-1 sequential IO
streams before the IO becomes randomized
N disk RAID 10 arrays can do N sequential read IO streams and N/2
sequential write IO streams before the IO becomes randomized"
Is (N-1) for RAID-5 because of parity disk and (N/2) for RAID-10 because of disk mirroring?
I believe that that is a correct assumption.