From owner-freebsd-isp  Thu Dec 17 19:06:37 1998
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Date: Fri, 18 Dec 1998 13:35:02 +1030
From: Greg Lehey <grog@lemis.com>
To: Dan Swartzendruber <dswartz@druber.com>
Cc: Matthew Patton <patton@sysnet.net>, freebsd-isp@FreeBSD.ORG
Subject: Re: RAID solutions?
References: <l03110705b29e428c72d1@[192.168.1.10]> <3.0.5.32.19981215231329.00966ae0@mail.kersur.net> <l03110705b29e428c72d1@[192.168.1.10]> <19981218131434.M486@freebie.lemis.com> <3.0.5.32.19981217220152.009c6100@mail.kersur.net>
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In-Reply-To: <3.0.5.32.19981217220152.009c6100@mail.kersur.net>; from Dan Swartzendruber on Thu, Dec 17, 1998 at 10:01:52PM -0500
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On Thursday, 17 December 1998 at 22:01:52 -0500, Dan Swartzendruber wrote:
>
> Greg, are there any performance ramifications with RAID5?  When not in
> degraded mode, of course...

Yes, big ones.  Every write in normal mode requires at least one
additional I/O to the parity block.  

Greg
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