From mboxrd@z Thu Jan  1 00:00:00 1970
From: "3tcdgwg3" <3tcdgwg3@prodigy.net>
Subject: Re: How safe is software RAID compared to how safe hardware RAID is!?
Date: Tue, 18 Nov 2003 16:23:54 -0800
Sender: linux-raid-owner@vger.kernel.org
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References: <16314.40792.616508.878124@notabene.cse.unsw.edu.au><PPEOJEIEFLAONFNHJPOOAEICGOAA.jim@jimtreats.com> <16314.44161.438158.27514@notabene.cse.unsw.edu.au>
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To: Neil Brown <neilb@cse.unsw.edu.au>, James R Bamford <jim@jimtreats.com>
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>
>  Some people find that their IDE controller works fine until they try
>  to use RAID1.  RAID1 hits multiple discs concurrently a lot, and some
>  (few, specific) ide controllers don't appear to cope.  You probably
>  would not get that with hardware raid.  You can with software raid
>  because it is a "whole-system" thing.
>
>

Did I do anything wrong?

I didn't see RAID 1 hits multiple drives concurrently, specially for
reading.

I set up RAID 5, RAID 1 and single disk partitions on x86 machine,
kernel 2.4-18.

For 800 MB breading, RAID 5 take 2/3 of time used by single disk,
but RAID 1 take 1.1 of time used by single disk.

Thanks.