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From: "Michael" <michael@insulin-pumpers.org>
To: linux-raid@vger.kernel.org
Subject: RE: Please help with a special RAID 1 setup
Date: Wed, 7 Jan 2004 10:59:02 -0800	[thread overview]
Message-ID: <200401071858.i07Iwx228259@bzs.org> (raw)
In-Reply-To: <8075D5C3061B9441944E137377645118012F02@cinshrexc03.shermfin.com>

<snip> 
> I don't believe that the above is a correct statement.  Linux
> software RAID1 will allow mirroring across more than 2 devices:
>

This is correct. Below is info and conf file from our raid1 setup

Boot sector (md1) is 3 partition raid 1
swap and root are 2 partition raid 1 with hot spare

Personalities : [raid0] [raid1] [raid5] 
read_ahead 1024 sectors
md1 : active raid1 sdc1[2] sdb1[1] sda1[0]
      15936 blocks [3/3] [UUU]

md2 : active raid1 sdc2[2] sdb2[1] sda2[0]
      489856 blocks [2/2] [UU]

md0 : active raid1 sdc3[2] sdb3[1] sda3[0]
      16924352 blocks [2/2] [UU]


# raid-1 configuration
raiddev /dev/md1
        raid-level              1
        nr-raid-disks           3
        chunk-size              4
# Spare disks for hot reconstruction
        nr-spare-disks          0
        persistent-superblock   1
        device                  /dev/sda1
        raid-disk               0
        device                  /dev/sdb1
        raid-disk               1
        device                  /dev/sdc1
        raid-disk               2

raiddev /dev/md0
        raid-level              1
        nr-raid-disks           2
        chunk-size              32
        nr-spare-disks          1
        persistent-superblock   1
        device                  /dev/sda3
        raid-disk               0
        device                  /dev/sdb3
        raid-disk               1
        device                  /dev/sdc3
        spare-disk              0

raiddev /dev/md2
        raid-level              1
        nr-raid-disks           2
        chunk-size              4
# Spare disks for hot reconstruction
        nr-spare-disks          1
        persistent-superblock   1
        device                  /dev/sda2
        raid-disk               0
        device                  /dev/sdb2
        raid-disk               1
        device                  /dev/sdc2
        spare-disk              0

Michael@Insulin-Pumpers.org

  reply	other threads:[~2004-01-07 18:59 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-01-07 18:14 Please help with a special RAID 1 setup Rechenberg, Andrew
2004-01-07 18:59 ` Michael [this message]
2004-01-07 20:17 ` Mircea Ciocan
  -- strict thread matches above, loose matches on Subject: below --
2004-01-13 20:50 linux
2004-01-07 19:28 Cress, Andrew R
2004-01-07 20:21 ` Mircea Ciocan
2004-01-07 15:32 Dr. Greg Wettstein
2004-01-07 14:48 Cress, Andrew R
2004-01-07 15:33 ` Mircea Ciocan
2004-01-07 16:09   ` Luca Berra
2004-01-07 10:16 Mircea Ciocan
2004-01-07 12:20 ` Catalin BOIE
2004-01-07 13:23   ` Mircea Ciocan
2004-01-07 13:31     ` Catalin BOIE
2004-01-07 13:47     ` Catalin BOIE

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