Re: mdadm + raid1 of 2 disks and now need to add more

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I now have the md0 raid1 with 2 disks and 1 spare:
       0      22       65        0      active sync   /dev/hdd1
       1      22       66        1      active sync   /dev/hdd2

       2      22       67        2      spare   /dev/hdd3

# /usr/local/sbin/mdadm -G -n 3 /dev/md0
mdadm: Cannot set raid-devices for /dev/md0: File exists

i'm using kernel 2.4.26

# /usr/local/sbin/mdadm -V
mdadm - v2.4.1 -  4 April 2006

On 4/11/06, Shai <shaibn@xxxxxxxxx> wrote:
> Hi,
>
> I have two SCSI disks on raid1.
> Since I have lots of reads from that raid, I want to add two more
> disks to this raid so that read will be faster.
>
> How should I add the new disks?
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