Subject: Re: RAIDFrame in Production Use
To: Jukka Marin <>
From: Johnny Billquist <>
List: netbsd-users
Date: 04/11/2003 13:08:49
On Fri, 11 Apr 2003, Jukka Marin wrote:

> The biggest surprise was that RAID1 is slower than the disks made me
> expect.  When the RAID is 100% busy, the disks are not, neither is the
> CPU.

Isn't that to be expected?
You are distributing disk I/O through one device to several other
devices. When that device is 100% busy, the underlying disks ought to be
(1/n)*100 % busy. Thus, if you only have one disk, it should be 100% busy,
but if you have two disks, they should only be 50% busy, both of them.


Johnny Billquist                  || "I'm on a bus
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