From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: Bug with RAID1 hot spares? Date: Tue, 24 Oct 2006 21:41:24 -0400 Message-ID: <453EC0C4.2040006@tmr.com> References: <200610202046.43033.chase.venters@clientec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200610202046.43033.chase.venters@clientec.com> Sender: linux-raid-owner@vger.kernel.org To: Chase Venters Cc: linux-raid@vger.kernel.org, jason.meinzer@gmail.com List-Id: linux-raid.ids Chase Venters wrote: >Greetings, > I was just testing a server I was about to send into production on kernel >2.6.18.1. The server has three SCSI disks with "md1" set to a RAID1 with 2 >mirrors and 1 spare. > I have to ask, why? If the array is mostly written you might save a bit of bus time, but for reads having another copy of the data to read (usually) helps the performance by reducing wait for read occurences. -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979