Re: IOPS from RAID units
- From: Cydrome Leader <presence@xxxxxxxxxxxxxx>
- Date: Mon, 24 Mar 2008 16:04:19 +0000 (UTC)
Bill Todd <billtodd@xxxxxxxxxxxxx> wrote:
Cydrome Leader wrote:
...
Unless you're some raid salesperson, who uses different definitions of
"operations" between the host and raid controller and then something else
between the raid controller and the disks themselves, I'm not following.
That's your problem. I'd suggest finding a tutor, if you can't learn
how a conventional RAID-5 array works from the description that I
provided or from other easily-accessible on-line resources.
- bill
I noticed you cut out my question, probably on purpose.
I'll ask again.
I want to change two blocks on a raid5 array, the host is changing 513
bytes, so it's really doing two writes of 512bytes each.
you and your buddy state that it only takes two write to do this on raid5.
So, can you explain how it only takes two 512byte writes to update data on
a raid5 aray where the change in user data is also two 512byes?
.
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